Before you read further — which describes you?
Quick Answer
California sales tax audit appeals follow a four-stage pathway: (1) Petition for Redetermination to CDTFA within 30 days of Notice of Determination; (2) CDTFA Appeals conference; (3) Office of Tax Appeals (OTA) hearing; and (4) Superior Court for judicial review. The short version is that the 30-day deadline is strict. CDTFA Appeals applies a hazards-of-litigation analysis similar to IRS Appeals. OTA is an independent body that hears contested tax matters. Most cases resolve at CDTFA Appeals or OTA; few proceed to Superior Court.1
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CDTFA appeals are effective. Professional representation at each level frequently produces material reductions. This chapter walks through the four stages.
The Four Appeal Stages
| Stage | Duration | Next Step2 |
|---|---|---|
| Petition | 30-day deadline | CDTFA Appeals conference |
| CDTFA Appeals | 6 to 12 months | OTA if denied |
| OTA | 12 to 18 months | Superior Court if denied |
| Superior Court | 1 to 2 years | Appeal to Court of Appeal |
Quick Reference
Jump to stage: petition, CDTFA Appeals, OTA, or Superior Court.
1. Petition for Redetermination
Must be filed within 30 days of Notice of Determination. The deadline is strict. Late petitions are not considered.
If this is you: Notice of Determination received. Calendar the 30-day deadline immediately. File Petition with specific objections (facts, calculation, methodology).
Petition Strategy
- Calendar deadline.
- Identify specific disputes.
- Gather supporting records.
- File with CDTFA Appeals section.
- Request oral hearing.
2. CDTFA Appeals
CDTFA Appeals conducts internal review, often resulting in partial or full concessions.
If this is you: CDTFA Appeals conference scheduled. Present disputes with documentation. Appeals often settles reasonably rather than fully litigating.
3. Office of Tax Appeals (OTA)
OTA is an independent state body that hears contested tax matters. Established in 2018 to replace Board of Equalization’s adjudicative function.
If this is you: CDTFA Appeals denied. OTA review available. Formal hearings with written briefs. 3-member panel decides.
4. Superior Court
Judicial review after OTA denial. Requires payment of tax (pay-to-litigate) typically.
If this is you: OTA denied. Superior Court is the next path. Pay-to-litigate rule means tax must be paid before suit in most cases. Complex litigation.
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CA Audit Appeal Document Lookup
| Document | Purpose |
|---|---|
| Petition for Redetermination | 30-day CDTFA Appeals request |
| CDTFA-345-SP | Notice of Determination |
| OTA Petition | Appeal to OTA |
| Claim for Refund | Pay-to-litigate refund path |
| Publication 17 | Appeals Procedures |
| RTC §6561 | Petition for Redetermination |
| RTC §6901 | Claim for refund |
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CA Audit Appeal Statute
- 30-day Petition deadline from Notice of Determination.
- OTA petition within 30 days of CDTFA Appeals denial.
- Refund suit statute: 3 years from payment.
- Superior Court paths after OTA denial.
CA Appeal Outcomes
| Stage | Typical Outcome |
|---|---|
| CDTFA Appeals | ~40% to 60% reduction |
| OTA | ~30% to 50% success |
| Superior Court | Variable; pay-to-litigate required |
CA Appeal Escalation
Petition
Filed within 30 days preserves appeal rights.
CDTFA Appeals Review
Internal review. Hazards-of-litigation standard.
OTA
Independent body. Formal hearing.
First 48 Hours Post-Assessment
- Read Notice of Determination carefully.
- Calendar 30-day deadline.
- Gather audit records.
- Identify specific disputes.
- File Petition for Redetermination.
- Engage counsel.
The ROI Question
CA appeals consistently produce assessment reductions. Professional appeal representation typically saves multiples of the fee.
When to Engage Attorney
- Any assessment over $25,000.
- Sampling methodology disputes.
- Penalty challenges.
- Prior Petition denial.
- OTA or Superior Court review.
Frequently Asked Questions
How do I appeal a California sales tax audit?
File Petition for Redetermination within 30 days of the Notice of Determination. CDTFA Appeals reviews first. If denied, appeal to Office of Tax Appeals (OTA). Superior Court review available after OTA denial. Each stage has specific procedures.
What is the deadline to appeal?
30 days from the Notice of Determination. Strict deadline — late filings are not considered. Certified mail with return receipt is recommended for proof.
What is CDTFA Appeals?
Internal review section within CDTFA that evaluates Petition for Redetermination. Applies hazards-of-litigation analysis. Most cases resolve here. Appeals conference typically scheduled 6 to 12 months after Petition filing.
What is the Office of Tax Appeals?
OTA is an independent state body established in 2018 to hear contested tax matters. Replaced Board of Equalization’s adjudicative function. Three-member panels decide. More formal than CDTFA Appeals.
Can I go to court for a sales tax audit dispute?
Yes, after OTA review. Superior Court applies pay-to-litigate rule in most cases — tax must be paid before suit. Court of Appeal review available after Superior Court judgment.
What is pay-to-litigate?
The California rule requiring payment of the tax before suit in Superior Court in most cases. Effectively blocks unpaid-tax litigation at the court level. OTA review does not require payment.
Does CDTFA collect during appeal?
Generally no while Petition for Redetermination is pending. Collection resumes if the petition is denied and the assessment becomes final. OTA pendency also typically pauses collection.
How long does a CA sales tax appeal take?
CDTFA Appeals: 6 to 12 months. OTA: 12 to 18 months. Superior Court: 1 to 2 years. Cumulative 2 to 4 years for fully contested matters.
Can I settle at CDTFA Appeals?
Yes. Appeals Officers have settlement authority. Partial concessions and compromised assessments are common. Hazards-of-litigation analysis produces settlement opportunities.
Do I need a lawyer for the appeal?
For assessments over $25,000, yes. CDTFA Appeals often results in material reductions with professional representation. OTA and Superior Court stages effectively require counsel.
Can I appeal only part of the assessment?
Yes. Petition can identify specific items for appeal while agreeing to others. Partial appeals are common — dispute sampling methodology while accepting documented line items.
What if I miss the 30-day Petition deadline?
Assessment becomes final. Collection can begin. Alternative paths include paying the assessment and filing a refund claim within 3 years. Refund suit in Superior Court after claim denial.
What’s the success rate at CDTFA Appeals?
Well-prepared appeals frequently produce 30% to 60% assessment reductions. Success rates at specific issue challenges (sampling methodology, penalty defense) are higher. Generic “I disagree” appeals have low success rates.
If you have read this far, you have a notice and you are trying to understand it before doing anything that makes it worse. That instinct is correct.
The next right move is a 15-minute call. We will identify the audit type, confirm your deadline, and tell you honestly whether you need representation. There is no cost and no obligation.
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