A California sales tax attorney represents businesses facing audits, assessments, and collection actions by the California Department of Tax and Fee Administration (CDTFA). The CDTFA is the state agency responsible for administering California’s sales and use tax program, which generates over $70 billion annually and affects every business that sells tangible personal property in the state. When the CDTFA audits your business, the resulting assessment can range from tens of thousands to millions of dollars, depending on the size of your operation and the audit period. The agency has broad authority under the Revenue and Taxation Code to examine your records, estimate unreported sales, and assess tax, interest, and penalties that can threaten the survival of your business.

At Brotman Law, we have represented hundreds of California businesses through CDTFA audits, petitions for redetermination, and hearings before the Office of Tax Appeals. Our practice focuses exclusively on tax controversy, and CDTFA defense is one of the areas where we have the deepest experience. We understand how CDTFA auditors think because we have sat across the table from them hundreds of times. We know what methodologies they apply, where the vulnerabilities in their assessments typically lie, and how to exploit those vulnerabilities systematically.

Call (619) 378-3138 to speak with a California sales tax attorney.

The 2026 CDTFA Enforcement Climate

California’s sales and use tax program is the state’s largest revenue source after personal income tax. In fiscal year 2025-2026, the CDTFA is on pace to collect over $80 billion in sales and use tax revenue — a figure that has grown steadily as the agency expands its enforcement reach into new sectors and transaction types. Understanding the current enforcement climate is critical for any business operating in California.

Ecommerce and marketplace facilitator enforcement. The CDTFA has dramatically increased audit activity targeting online sellers since the U.S. Supreme Court’s South Dakota v. Wayfair decision eliminated the physical presence requirement for sales tax nexus. California adopted economic nexus rules requiring out-of-state sellers exceeding $500,000 in California sales to collect and remit sales tax. The CDTFA now actively audits marketplace facilitators, third-party sellers on platforms like Amazon and Shopify, and direct-to-consumer ecommerce businesses that may not have registered for a seller’s permit despite meeting the economic nexus threshold.

Cross-agency data sharing. The CDTFA does not operate in isolation. The agency shares taxpayer data with the IRS, the California Franchise Tax Board (FTB), and the Employment Development Department (EDD) under formal information-sharing agreements. When your federal income tax return reports gross receipts that exceed the taxable sales on your CDTFA returns, that discrepancy is flagged automatically. The same data-matching programs compare your FTB filings, your EDD payroll reports, and your CDTFA returns to identify businesses that may be underreporting. This cross-agency coordination means that a discrepancy on one return can trigger audits from multiple agencies simultaneously.

Wayfair nexus expansion. The CDTFA continues to broaden its interpretation of economic nexus, pursuing businesses that sell digital goods, license software, or provide services that include tangible personal property components. Businesses that assumed they had no California nexus are increasingly receiving audit notifications and registration demands.

Industry-specific enforcement units. The CDTFA has established dedicated audit teams for cannabis, fuel and petroleum, and timber industries. These specialized units bring deep industry knowledge and proprietary audit methodologies that generalist auditors do not possess. If your business operates in one of these sectors, you are facing auditors who have seen every compliance shortcut and know exactly where to look.

Types of CDTFA Audits and Examinations

The CDTFA conducts several types of audits, each with different procedures, scopes, and levels of scrutiny. Understanding which type of audit your business is facing is the first step in building an effective CDTFA defense strategy.

Desk Audits

A desk audit is the least invasive form of CDTFA examination. The auditor reviews your returns and records remotely, typically requesting documentation by mail or through the CDTFA’s online portal. Desk audits are common for businesses with lower annual sales volumes or for issues involving a specific transaction or exemption claim. The auditor may request copies of resale certificates, exemption certificates, or documentation supporting specific deductions on your returns.

Do not mistake a desk audit for a minor issue. The CDTFA can and does issue substantial assessments based entirely on desk reviews, particularly when businesses fail to respond to document requests or cannot produce adequate records. If the auditor cannot verify your reported figures, they have the authority under Revenue and Taxation Code section 6481 to estimate your tax liability using the best information available.

Field Audits

Field audits are the most common and most consequential form of CDTFA examination. A field auditor physically visits your business, examines your books and records on-site, and conducts a comprehensive review of your sales and use tax compliance. The auditor will typically request three years of records, including sales journals, purchase journals, bank statements, federal income tax returns, general ledgers, guest checks or invoices, Z-tapes or POS reports, and resale and exemption certificates.

The field audit process involves several analytical techniques. The auditor will perform a markup analysis, comparing your reported sales to your cost of goods sold to determine whether your reported markup is consistent with industry standards. For restaurants, the CDTFA maintains detailed markup tables by cuisine type and service model. For retailers, they compare your markup to competitors in the same industry and geographic area.

If the auditor determines that your reported markup is lower than expected, they will use sampling methods to estimate unreported sales. The auditor may select a sample period — often one month or one quarter — and project the results across the entire audit period. This is where the largest assessments originate. A relatively small discrepancy in one month, when extrapolated over three years, can produce an assessment of hundreds of thousands of dollars.

Managed Audit Program (MAP)

The CDTFA’s Managed Audit Program, authorized under Revenue and Taxation Code section 7076, allows qualifying businesses to conduct a portion of their own audit under CDTFA supervision. Under MAP, the business performs the detailed examination of its own records using audit procedures agreed upon with the CDTFA, and the CDTFA reviews and verifies the results.

MAP can be advantageous for businesses with complex records systems or multiple locations because you control the pace and have more time to identify and present favorable documentation. However, MAP is not available in all situations — the CDTFA will not approve MAP if there are indications of fraud, if the business has been uncooperative, or if the audit involves particularly complex issues. We advise clients on whether MAP is strategically beneficial before they agree to participate.

Use Tax Audits

Use tax is the complement to sales tax. It applies when a California business purchases tangible personal property from an out-of-state seller who does not collect California sales tax, or when a business uses inventory items that were purchased tax-free for resale. The CDTFA increasingly focuses on use tax compliance, particularly for businesses that make significant out-of-state purchases of equipment, supplies, or materials.

Use tax audits typically involve a detailed comparison of your purchase records against your use tax returns. The auditor will review accounts payable records, purchase orders, and vendor invoices to identify purchases where California use tax was not self-assessed and remitted. Construction companies, manufacturers, and technology businesses are frequent targets for use tax audits because they often purchase equipment and materials from out-of-state vendors. These businesses may also face EDD payroll tax audits simultaneously.

District Tax Audits

California’s sales tax rate includes both a statewide component and district taxes imposed by cities and counties. District tax audits focus on whether your business is correctly sourcing sales to the proper tax district. This is particularly relevant for businesses with multiple locations, businesses that deliver goods to customers in different jurisdictions, and e-commerce sellers shipping to addresses throughout California.

District tax issues are technically complex because California’s sourcing rules differ depending on whether the sale involves delivery, pickup, or drop shipment. Under Regulation 1802, the place of sale for district tax purposes depends on the type of transaction and the location of the property at the time of sale. Errors in district tax sourcing can result in assessments from one district and refund claims against another, creating a complicated web of adjustments that requires careful legal analysis.

What Triggers a CDTFA Audit?

The CDTFA does not randomly select most businesses for audit. While a small percentage of audits are truly random, the vast majority are triggered by specific risk factors that the agency monitors through its analytics and selection systems.

High-risk industries. Certain industries are audited at significantly higher rates than others. Restaurants and food service businesses are the single most frequently audited category because of the inherent difficulty in tracking cash sales and the complexity of taxable versus non-taxable food sales (Regulation 1603). Auto dealers face frequent scrutiny because of the high dollar value of individual transactions and trade-in calculations. Cannabis businesses are audited aggressively because the industry is relatively new, compliance infrastructure is still developing, and the CDTFA is actively building its enforcement presence in the cannabis sector. Liquor stores, convenience stores, and any business with significant cash receipts are also high on the CDTFA’s audit selection list.

Large discrepancies between reported income and expected sales tax. The CDTFA cross-references your sales tax returns with your federal income tax returns (obtained from the IRS under information-sharing agreements) and your California franchise tax returns (shared by the FTB). If your reported gross receipts on your income tax returns are significantly higher than the taxable sales reported on your sales tax returns, you will almost certainly be selected for audit. Even legitimate explanations — such as a high volume of exempt sales or out-of-state sales — will trigger the audit if the discrepancy is large enough.

Tips and referrals. The CDTFA receives tips from former employees, competitors, ex-spouses, and other sources. These referrals are taken seriously and frequently result in audits, particularly when the tip includes specific information about unreported cash sales or fraudulent practices.

Random selection. A small percentage of audits are generated through the CDTFA’s random selection program, designed to measure overall compliance rates within specific industries and geographic regions. There is nothing you can do to avoid a random selection audit except maintain complete and accurate records.

Delinquent filing. If your business has a history of late filings, missed returns, or underreported tax, the CDTFA will flag your account for audit. Consistent delinquency signals to the agency that your books may not be in order and that a full examination is warranted.

Industry-specific markup ratios. The CDTFA maintains internal databases of expected markup ratios by industry. If your reported markup falls significantly below the expected range for your business type, this triggers a flag in the CDTFA’s audit selection system. For example, if the average restaurant in your cuisine category reports a 300% markup on food costs and you report 180%, you will likely be selected for audit.

8 Common CDTFA Audit Trigger Scenarios

Based on our experience defending hundreds of CDTFA audits, these are the eight most common scenarios that trigger an examination. If your business fits any of these profiles, proactive preparation with a tax attorney for business owners can significantly reduce your exposure.

1. Markup analysis discrepancy. This is the number one audit trigger for restaurants, bars, and retail businesses. The CDTFA compares your reported gross sales against your cost of goods sold to calculate your markup percentage. If your markup falls below the agency’s internal benchmarks for your industry and cuisine type, your business is flagged for a field audit. Restaurants reporting food markups below 250% and bars reporting beverage markups below 200% are almost guaranteed to be selected.
2. Missing or invalid exemption certificates. If your business claims a high percentage of exempt sales — whether resale, manufacturing, or food exemptions — but cannot produce valid exemption certificates under Regulation 1668, the CDTFA will reclassify those transactions as taxable retail sales. A single missing resale certificate on a $500,000 wholesale transaction creates a $50,000+ tax liability.
3. Use tax on out-of-state purchases. Businesses that purchase equipment, materials, or supplies from out-of-state vendors who do not collect California tax owe use tax on those purchases. The CDTFA cross-references your accounts payable records and federal depreciation schedules to identify unreported use tax obligations. Construction companies, manufacturers, and technology firms are the most frequent targets for use tax assessments.
4. Unreported ecommerce sales. The CDTFA uses data from marketplace facilitators, payment processors, and shipping companies to identify online sellers who are not reporting California sales. If you sell on Amazon, eBay, Etsy, or your own website and have not registered for a California seller’s permit or are underreporting online revenue, the CDTFA will find the discrepancy.
5. Industry-targeted audits. Certain industries face heightened scrutiny every year. Cannabis dispensaries and distributors are audited at rates far exceeding other industries because of the sector’s cash-heavy operations and evolving regulatory framework. Construction contractors face targeted audits on the distinction between time-and-materials contracts and lump-sum contracts. Auto dealers are audited for trade-in credit calculations and out-of-state delivery exemptions.
6. Sales tax return inconsistencies. Filing patterns that deviate from your historical norms — such as a sudden drop in reported taxable sales, inconsistent quarterly filing amounts, or reported deductions that spike without explanation — trigger automated flags in the CDTFA’s audit selection system. The agency’s analytics compare your current returns to your own filing history and to industry averages.
7. Informant tips. Disgruntled employees, former business partners, competitors, and ex-spouses regularly contact the CDTFA with information about unreported sales, off-the-books cash transactions, and fraudulent practices. The CDTFA investigates these tips seriously, and they frequently result in audits that focus specifically on the reported conduct.
8. Business acquisition without a clearance certificate (successor liability). Under Revenue and Taxation Code section 6811 and Regulation 1702, a buyer who acquires a business without obtaining a tax clearance certificate from the CDTFA can inherit the seller’s entire unpaid sales tax liability. The CDTFA actively monitors business transfers through Secretary of State filings and seller’s permit applications to identify acquisitions where the buyer failed to request clearance. Successor liability assessments can reach hundreds of thousands of dollars for liabilities the buyer had no role in creating.

The CDTFA Audit Process Step by Step

Understanding the procedural steps of a CDTFA audit is essential for protecting your rights and managing the process effectively. Each stage presents specific opportunities and risks. Here is what to expect, and the timeline for each step, from the moment you receive your audit notification through the final appeal. For a more detailed discussion, see our complete guide to California sales tax audits.

1. Engagement letter and audit notification (Week 1). The CDTFA sends a letter informing you that your business has been selected for audit. The letter identifies the audit period (typically the most recent three years of filed returns), the auditor assigned to your case, and a proposed date for the initial meeting. You have the right to request a different date and to have your attorney present from the first contact.
2. Pre-audit conference (Weeks 2-4). This is the first meeting between the auditor and your representative. The auditor explains the scope and objectives of the audit, identifies the records that will be needed, and discusses the timeline. This meeting is strategically critical. How you present your business at the pre-audit conference shapes the auditor’s approach to the entire examination. We use this meeting to establish the narrative, address potential issues proactively, and set expectations for the process.
3. Records request and document production (Weeks 4-12). The auditor issues a formal records request. The standard CDTFA records request covers sales journals, purchase journals, bank statements, federal and state income tax returns, general ledger, chart of accounts, resale certificates, exemption certificates, and POS system reports. For restaurants, the auditor will also request guest checks, daily sales summaries, and menu prices. Organizing and producing these records properly is one of the most important steps in the process.
4. Examination period (Months 3-12). This is the core of the audit. The auditor reviews your records, performs markup analysis, selects sample periods for detailed testing, reconciles your reported sales to your bank deposits and purchase records, and identifies discrepancies. The examination period is where most assessments are built. If we can demonstrate that the auditor’s methodology is flawed or that discrepancies have legitimate explanations, we can significantly reduce or eliminate the proposed assessment.
5. Draft findings and preliminary assessment (Month 10-14). After completing the examination, the auditor prepares draft findings and shares them with your representative. This is an informal stage where the auditor presents what they believe you owe and the basis for their calculations. The draft findings are not final and are negotiable. We review every line of the auditor’s workpapers and challenge errors in methodology, sampling, and computation.
6. Closing conference (Month 12-16). The closing conference is a formal meeting where the auditor presents the final audit findings and allows you to respond. You and your attorney can present additional documentation, challenge specific adjustments, and negotiate the final assessment amount. The closing conference is your last opportunity to resolve issues at the audit level before the CDTFA issues a formal determination.
7. Notice of Determination (Month 14-18). If the audit results in an assessment, the CDTFA issues a Notice of Determination under Revenue and Taxation Code section 6481. This is a formal legal document stating the amount of tax, interest, and penalties the CDTFA believes you owe. The Notice of Determination triggers your right to file a petition for redetermination within 30 days of the date of service.
8. Petition for Redetermination (within 30 days of the Notice). Filing a petition for redetermination is your formal administrative appeal of the CDTFA’s assessment. The petition must be filed within 30 days. This deadline is jurisdictional — if you miss it, you lose your right to challenge the assessment administratively. The petition should identify each specific item you are contesting and the legal and factual basis for your position. We draft petitions that lay the groundwork for a successful appeal by presenting clear legal arguments supported by documentary evidence.
9. Office of Tax Appeals (OTA) hearing (Months 18-36). If the CDTFA denies your petition for redetermination, you can appeal to the Office of Tax Appeals, an independent agency that hears appeals from all California tax agencies. The OTA hearing is a quasi-judicial proceeding before a three-judge panel. You have the right to present evidence, call witnesses, and make legal arguments. OTA decisions are published and create precedent for future cases. If the OTA rules against you, your remaining option is to pay the tax and file a claim for refund, followed by a suit in Superior Court under Revenue and Taxation Code section 6933.

Consequences of a CDTFA Assessment

A CDTFA assessment is not just a bill. It carries legal consequences that can affect your business operations, your personal finances, and your ability to continue operating in California. Understanding these consequences is essential for evaluating your options and the urgency of mounting a defense. For a comprehensive overview of what happens after an assessment, read our guide to CDTFA collections.

Interest. The CDTFA charges interest on underpaid tax from the original due date of the return. The interest rate is adjusted quarterly and is currently set at the modified adjusted rate per month, which typically translates to an annualized rate between 5% and 10%. On a $200,000 assessment covering a three-year audit period, interest alone can add $40,000 to $80,000 to the total amount owed.

Penalties. The CDTFA imposes several categories of penalties, and multiple penalties can apply to the same assessment:

• Negligence penalty (10%). Applied under Revenue and Taxation Code section 6484 when the CDTFA determines that the underreporting resulted from a failure to exercise ordinary care. On a $300,000 assessment, this adds $30,000.
• Fraud penalty (25%). Applied under Revenue and Taxation Code section 6485 when the CDTFA determines that the underreporting was intentional. A fraud finding on a $500,000 assessment adds $125,000 — and can trigger referral for criminal prosecution.
• Failure to file penalty (10% per month, up to 40%). Applied under Revenue and Taxation Code section 6591 for each month a return is late, capped at 40% of the tax due. A business that files a year late on a $100,000 liability faces an additional $40,000 in penalties.

Liens on business property. The CDTFA has the authority to record a state tax lien against your business and personal property. A CDTFA lien attaches to all real and personal property in California and is a matter of public record. It will appear on credit reports and can prevent you from selling property, refinancing, or obtaining business financing.

Bank levies. The CDTFA can levy your business bank accounts without first obtaining a court order. A bank levy freezes the funds in your account and requires the bank to remit those funds to the CDTFA. This can shut down your business operations overnight if your operating accounts are levied. If you are facing an outstanding CDTFA balance, consult a tax debt relief attorney to explore your resolution options.

Seizure of business assets. In extreme cases, the CDTFA has the authority under Revenue and Taxation Code section 6796 to seize and sell business assets — including inventory, equipment, and vehicles — to satisfy a tax liability.

Revocation of seller’s permit. The CDTFA can revoke your seller’s permit under Revenue and Taxation Code section 6066 if you fail to pay an assessed liability. Without a seller’s permit, you cannot legally sell tangible personal property in California. This effectively forces your business to close until the tax issue is resolved.

Personal liability for corporate officers. This is the consequence that surprises most business owners. Under Revenue and Taxation Code section 6829, any person who is responsible for filing sales tax returns and remitting the tax — including corporate officers, LLC members, and key employees — can be held personally liable for the unpaid tax. The CDTFA can pursue your personal assets, including your home, personal bank accounts, and investments, to collect a business sales tax debt. A $400,000 corporate assessment can become a $400,000 personal liability for the company’s president, CFO, or any other officer who had authority over the company’s tax compliance.

CDTFA Publications and Regulations You Should Know

The CDTFA publishes a library of industry-specific publications and formal regulations that govern how California sales and use tax applies to different business types and transactions. These publications are the same materials CDTFA auditors use when examining your business. Understanding the publications that apply to your industry helps you anticipate audit issues and prepare an effective defense.

• Publication 76 — Audits. This is the CDTFA’s own guide to the audit process. It explains what to expect during an audit, what records the auditor will request, and your rights as a taxpayer. We advise every client to read Publication 76 before the first meeting with the auditor — and we walk them through what it means in practice for their specific case.
• Regulation 1698 — Records. This regulation defines the records every California seller must maintain and make available for CDTFA examination. It specifies that records must be kept for at least four years and must include sales invoices, purchase invoices, exemption certificates, bank statements, and general ledger entries. Failure to maintain records under Regulation 1698 gives the auditor authority to estimate your tax liability using alternative methods.
• Regulation 1703 — Interest and Penalties. This regulation governs the calculation of interest on underpaid tax and the imposition of penalties for negligence, fraud, and late filing. Understanding Regulation 1703 is essential for evaluating the total exposure from a CDTFA assessment and for preparing penalty abatement requests under Revenue and Taxation Code section 6592.
• Regulation 1702 — Successor Liability. When a business changes hands, the buyer may inherit the seller’s unpaid sales tax obligations. Regulation 1702 defines when successor liability applies, how to request a tax clearance certificate, and the escrow and notice requirements that protect buyers from inheriting prior tax debts. If you are acquiring a California business, understanding this regulation is essential.
• Regulation 1525.4 — Manufacturing Exemptions. California provides a partial sales tax exemption for manufacturing and research equipment under Revenue and Taxation Code section 6377.1. Regulation 1525.4 defines which equipment qualifies, the documentation required, and the limitations on the exemption. Manufacturers who fail to properly document their exemption claims face assessments on the full purchase price of qualifying equipment.
• Publication 22 — Dining and Beverage Industry. This is the CDTFA’s guide to the complex rules governing taxable and non-taxable food sales. It covers heated food, carbonated beverages, food sold with utensils, catering, tips and service charges, and the distinction between food for consumption on premises versus to-go sales. Publication 22 is the auditor’s primary reference in every restaurant audit.
• Publication 557 — Cannabis Industry. This publication covers sales tax, excise tax, and the now-repealed cultivation tax obligations for cannabis businesses. It addresses the unique compliance requirements for licensed cultivators, manufacturers, distributors, and retailers.
• Publication 34 — Motor Vehicle Dealers. This publication governs sales tax on vehicle sales, trade-in credits, out-of-state deliveries, dealer add-ons, and used vehicle transactions. Auto dealers face unique audit issues addressed exclusively in Publication 34.
• Publication 9 — Construction and Building Contractors. Contractors are generally consumers of the materials they install, not retailers. Publication 9 explains when contractors owe use tax, how the type of contract (time-and-materials versus lump-sum) determines tax obligations, and how to handle fixtures versus improvements to real property.
• Publication 77 — Internet and Mail-Order Sales. This publication covers nexus requirements for online sellers, marketplace facilitator obligations, sourcing rules for shipped goods, and the application of district taxes to ecommerce transactions. It is essential reading for any business selling into California from out of state.

Settlement and Resolution Options for CDTFA Debt

If your business owes sales tax to the CDTFA — whether from an audit assessment, accumulated delinquencies, or a penalty determination — there are several formal resolution paths available. A tax debt relief attorney can evaluate which option gives your business the best chance of resolving the liability while continuing operations.

CDTFA Offer in Compromise. The CDTFA accepts offers in compromise under Revenue and Taxation Code section 7093.5, allowing taxpayers to settle their liability for less than the full amount owed. To qualify, you must demonstrate that you cannot pay the full amount and that the offered amount represents the most the CDTFA can reasonably expect to collect. The CDTFA evaluates your income, assets, expenses, and future earning capacity. Offers in compromise are difficult to obtain — the acceptance rate is low — but when successful, they can reduce six-figure liabilities to a fraction of the original amount.

Installment agreements. If you cannot pay the full assessment immediately but have the ability to pay over time, the CDTFA will consider an installment payment agreement. Interest continues to accrue on the unpaid balance during the installment period, but an installment agreement prevents active collection actions such as bank levies and asset seizures.

Managed Audit Program. As discussed above, the Managed Audit Program under Revenue and Taxation Code section 7076 allows qualifying businesses to conduct portions of their own audit. While MAP is primarily an audit procedure, it can serve as a resolution strategy by allowing the business to identify favorable documentation that reduces the final assessment amount before the Notice of Determination is issued.

Petition for Redetermination. Filing a petition for redetermination within 30 days of the Notice of Determination is not just an appeal right — it is a resolution mechanism. The petition reopens the case for additional review, and many assessments are significantly reduced or eliminated during the petition process through additional documentation and legal argument.

Office of Tax Appeals (OTA). If the CDTFA denies your petition for redetermination, you can appeal to the OTA. The OTA is an independent agency with a three-judge panel that reviews the case de novo. OTA hearings are your opportunity to present evidence, challenge the CDTFA’s methodology, and make legal arguments before judges who are not employed by the CDTFA.

Superior Court review. If you exhaust your administrative remedies and still disagree with the determination, you can pay the assessed tax and file a claim for refund, followed by a suit in California Superior Court under Revenue and Taxation Code section 6933. Superior Court review is the final option and involves full civil litigation procedures, including discovery, motions, and potentially a jury trial.

What a Sales Tax Attorney Does That a CPA Cannot

CPAs and enrolled agents play an important role in sales tax compliance. Many businesses rely on their CPA for return preparation, recordkeeping advice, and general tax planning. But when a CDTFA audit produces a significant assessment — or when the stakes involve potential fraud allegations, personal liability, or business survival — a sales tax attorney provides protections and capabilities that accountants cannot.

Attorney-client privilege. This is the single most important distinction. All communications between you and your attorney made for the purpose of seeking legal advice are protected by the attorney-client privilege. The CDTFA cannot compel your attorney to disclose what you said, what documents you provided, or what strategy you discussed. This protection does not apply to CPAs. Under Section 7525 of the Internal Revenue Code, there is a limited federally authorized practitioner privilege for CPAs, but it does not extend to state tax matters and does not apply in criminal investigations. If your sales tax situation involves any possibility of criminal exposure — including fraud allegations or referral to the Attorney General — privilege is not optional. It is essential.

Litigation capability. A CPA cannot represent you before the Office of Tax Appeals or in Superior Court. If your CDTFA dispute cannot be resolved administratively, only an attorney can take your case to hearing or trial. OTA hearings involve legal briefing, evidentiary procedures, and oral argument before a three-judge panel. These are legal proceedings that require legal training.

Negotiation leverage. CDTFA auditors and supervisors understand the difference between an attorney and an accountant across the table. When we sit across from a CDTFA auditor, the auditor knows we are prepared to litigate, to challenge the assessment on legal grounds, and to appeal to the OTA or Superior Court if necessary. We have seen this change the negotiation dynamic in ways that directly benefit our clients.

Penalty abatement advocacy. Penalty abatement requires demonstrating “reasonable cause” under Revenue and Taxation Code sections 6591.5 and 6592. This is a legal standard that requires legal analysis and legal argumentation. We understand the CDTFA’s internal guidelines for evaluating reasonable cause claims and draft penalty abatement requests that address the specific factors the agency considers.

Successor liability defense. If you are purchasing a business, you may inherit the seller’s unpaid sales tax liability under Revenue and Taxation Code section 6811 unless you properly comply with the bulk sale notice and escrow requirements. Successor liability is a legal issue that requires legal counsel, not accounting advice.

Attorney vs. CPA vs. Tax Relief Company. Tax relief companies advertise aggressively and charge large upfront fees, but they are typically staffed by junior preparers and enrolled agents who have no litigation capability and no attorney-client privilege to offer. A CPA is appropriate for return preparation and routine compliance questions. A tax attorney for business owners is necessary when the stakes are high, when there is any risk of personal liability or criminal referral, and when the case may require administrative appeal or litigation.

CDTFA Industries We Defend

California sales tax compliance varies dramatically by industry. Each sector faces unique audit triggers, specific regulatory requirements, and industry-specific CDTFA publications that govern how transactions are taxed. We represent businesses across all of the following industries.

Brotman Law CDTFA Results

We measure our performance by outcomes. Here are representative results from recent CDTFA matters we have handled. Each case involved different facts, different industries, and different legal issues, but they share a common theme: thorough, well-prepared defense produces significantly better results than accepting the CDTFA’s initial assessment. See our full results page for additional case studies.

Areas We Serve

Brotman Law represents businesses in CDTFA matters throughout California. While our headquarters are in San Diego, we handle cases involving every CDTFA district office in the state. Here are the regions where we are most active:

San Diego (Headquarters). Our home office is in San Diego, and we appear regularly before the CDTFA San Diego District Office. San Diego County restaurants, retailers, and cannabis businesses are among our most frequent clients.

Los Angeles. The CDTFA Los Angeles District Office handles the highest audit volume in the state. We represent businesses throughout Los Angeles County, including the city of Los Angeles, Long Beach, Pasadena, Santa Monica, and the San Fernando Valley.

Orange County. The CDTFA Santa Ana District Office serves Orange County businesses. We handle audits for retailers, restaurants, auto dealers, and technology companies throughout Irvine, Anaheim, Newport Beach, and surrounding cities.

San Francisco Bay Area. The CDTFA Oakland and San Jose District Offices serve the greater Bay Area. We represent technology companies, SaaS businesses, manufacturers, and retailers throughout San Francisco, Oakland, San Jose, and Silicon Valley.

Sacramento. The CDTFA Sacramento District Office, located near the agency’s headquarters, serves businesses throughout the Sacramento metropolitan area and the Central Valley. We handle audits for construction companies, wholesalers, and retailers in this region.

Riverside and San Bernardino (Inland Empire). The CDTFA Riverside District Office serves the Inland Empire. Logistics companies, distributors, and manufacturers in this region frequently face use tax audits due to the volume of goods moving through the region’s warehouse and distribution infrastructure.

Fresno and Central Valley. The CDTFA Fresno District Office serves the agricultural heart of California. We represent food processors, agricultural equipment dealers, and retailers throughout Fresno, Bakersfield, and the surrounding region.

Statewide. CDTFA audits are conducted by district offices, but the legal issues are the same regardless of geography. We represent businesses in all 58 California counties and before all CDTFA district offices, including Culver City, West Covina, Norwalk, Van Nuys, Laguna Hills, Rancho Mirage, Santa Rosa, Salinas, and Ventura.

How We Defend Your CDTFA Audit: Step by Step

1. Free Intro Call — We review your CDTFA notice, assess the audit scope, and explain your options.
2. Power of Attorney — We file Form BOE-392 so CDTFA communicates with us, not you.
3. Record Review — We organize your sales records, exemption certificates, and resale permits before the auditor sees them.
4. Audit Conference — We attend all meetings with the CDTFA auditor, control the document flow, and challenge unfounded markup assumptions.
5. Assessment Negotiation — If an assessment is proposed, we negotiate reductions based on sampling errors, exempt transactions, and documentation gaps.
6. Petition for Redetermination — If we can’t resolve at audit level, we file a formal petition within 30 days.
7. OTA Appeal — We represent you before the Office of Tax Appeals for an independent review.
8. Resolution — We negotiate a settlement, installment agreement, or OIC to close the matter.

Call (619) 378-3138 to get started with a free intro call.

What Only a Practitioner Would Know About CDTFA Sales Tax Audits

The Observation Test: CDTFA’s Key Audit Tool for Restaurants

For restaurant audits, CDTFA auditors will often conduct an unannounced “observation test” — sitting in the restaurant for 1-3 days counting transactions and comparing them to reported sales. If the observed sales exceed reported numbers, the auditor extrapolates the discrepancy across the entire audit period. We have challenged observation tests by documenting that the observation days were atypical — holiday weekends, special events, catering days — and we have successfully reduced assessments by 60-80% using this approach. The observation test is powerful, but it is only as reliable as the days the auditor chose to observe.

The Markup Method Is an Estimate — And Estimates Are Rebuttable

When records are incomplete, CDTFA uses the markup method: they apply industry-average markups to your cost of goods sold. But Regulation 1698 requires the audit to use your actual markup, not the industry average, if you can document it. We reconstruct actual markups from purchase invoices, menu prices, and waste logs to replace the auditor’s estimate with verifiable numbers. In case after case, we have shown that the auditor’s industry-average markup overstated actual sales by 30-50% — and the CDTFA has accepted our documented figures when we present them with the supporting data.

Claiming the Bad Debt Deduction After the Audit

Under Revenue and Taxation Code §6055, you can claim a sales tax deduction for bad debts — accounts receivable you reported as taxable sales but never collected. Most businesses do not claim this during audits because they do not realize it applies. We routinely identify uncollected receivables during audit defense that reduce the assessment. This is one of the first things we look for when we review a client’s records, and it is surprising how often it produces meaningful savings.

Settlement Authority Lives at the District Level

Unlike the IRS, where settlement authority rests with Appeals, CDTFA settlement discussions often happen at the district office level with the audit supervisor. We have negotiated significant reductions before the case ever reaches the formal appeals process. The key is presenting a documented counter-analysis — not just objecting to the assessment. When we sit down with the audit supervisor and present our own markup reconstruction, our own sampling analysis, and our own documentation, we are speaking their language — and that is when settlements happen.