Quick Answer
Four common multistate problems trigger state audits: (1) 1099-K / marketplace facilitator data mismatches; (2) state-to-state information sharing via MTC and individual agreements; (3) competitor tips and disgruntled employee reports; and (4) proactive state enforcement of economic nexus post-Wayfair. The short version is that states are increasingly aggressive about identifying non-compliant out-of-state businesses. In our experience, the best defense is voluntary compliance before detection.1
Multistate problem? A 15-minute consultation is free.
Four triggers for state tax problems.
The Four Multistate Triggers
| Trigger | Source2 |
|---|---|
| 1099-K / Marketplace | Payment processor data |
| Information Sharing | MTC / bilateral agreements |
| Tips | Competitors / former employees |
| Economic Enforcement | Proactive state outreach |
Quick Reference
Jump to: 1099-K, info-share, tips, or economic.
1. 1099-K and Marketplace Facilitator Data
Payment processor data shared with states.
If this is you: Stripe, Square, PayPal, Amazon report to states. 1099-K data shared. Automated matching detects unregistered sellers.
1099-K Response Strategy
- Anticipate data sharing.
- Proactively register where nexus exists.
- Reconcile 1099-K to registrations.
- Respond promptly to inquiries.
- Engage counsel for audit.
2. Information Sharing
MTC and bilateral agreements permit data exchange.
If this is you: Filing in one state can trigger inquiry from another. MTC information sharing. Bilateral agreements. Federal-state information sharing.
3. Competitor and Employee Tips
Competitors and former employees report unregistered competitors.
If this is you: Competitive market. Disgruntled former employee. Whistleblower program in some states. Tips trigger investigations.
4. Proactive Economic Nexus Enforcement
States actively identify post-Wayfair non-compliant sellers.
If this is you: Out-of-state seller exceeding thresholds. States purchase third-party data. Proactive outreach campaigns. Audit letters common.
State triggered? Book consultation.
Trigger Source Lookup
| Source | Data |
|---|---|
| 1099-K | Payment processor transactions |
| Marketplace facilitator | Amazon / eBay / Etsy reports |
| MTC compact | State-to-state info share |
| FTA / IRS info share | Federal-state exchange |
| Whistleblower programs | Tip-based enforcement |
Trigger Statute
- 3-4 year state statute typical.
- Unfiled: unlimited.
- Pre-trigger VDA limits look-back.
Trigger Patterns
| Situation | Outcome |
|---|---|
| Proactive VDA | Best outcome |
| 1099-K mismatch | Audit letter |
| Info-share triggered | Multi-state inquiry |
| Post-trigger VDA unavailable | Audit resolution needed |
Trigger Escalation
Initial Letter
Nexus questionnaire or audit notice.
Examination
Multi-year back-tax.
Resolution
Assessment, settlement, or appeal.
First 48 Hours
- Do not respond without counsel.
- Preserve records.
- Assess exposure.
- Evaluate VDA availability.
- Engage counsel.
The ROI Question
Post-trigger audits can cost six figures. Pre-trigger VDA prevents the worst outcomes.
Dealing with Multistate Tax Exposure?
Multistate obligations don’t announce themselves — most businesses accumulate sales tax, income tax, or payroll tax exposure in other states without realizing it until they’re contacted or audited. If you’re selling across state lines, have remote employees, or aren’t sure where your business has nexus, a brief review can identify where you have exposure and what to do about it.
Review My Multistate Exposure → Or call: (619) 378-3138
When to Engage
- State notice received.
- Known compliance gaps.
- Multi-state exposure.
- Whistleblower situation.
Frequently Asked Questions
How do states find unregistered businesses?
Four main channels — 1099-K / marketplace facilitator data, state-to-state information sharing (MTC), competitor / employee tips, proactive economic nexus enforcement post-Wayfair.
What is 1099-K data sharing?
Payment processors report to IRS and states. States match against registrations. Mismatches trigger inquiries. Stripe, Square, PayPal, Amazon all report.
What is MTC?
Multistate Tax Commission. Compact between states for uniform administration. Information sharing. MTC audit can cover multiple states.
How do whistleblowers affect state tax?
Many states have whistleblower programs offering percentage of recoveries. Competitors, former employees, vendors incentivized to report. Tips investigated.
What is proactive economic nexus?
States identify remote sellers exceeding thresholds. Purchase third-party data. Send outreach letters. Voluntary compliance before audit preferred.
Can I be discovered later?
Yes. States have extended periods to discover non-filers. Unfiled returns have unlimited statute. Detection risk compounds.
What to do if letter received?
Engage counsel before responding. Preserve records. Evaluate eligibility for limited-look-back VDA alternative.
Is response mandatory?
Yes typically. Non-response invites default assessment. Attorney-drafted response preserves rights.
Can VDA still help post-letter?
Generally no. VDA typically requires pre-contact. Post-contact resolution in audit setting.
What's the cost of audit vs. VDA?
Audit: full statute + penalties + interest. VDA: limited look-back + penalty abatement + interest. VDA typically saves 50%+.
Does one state triggering affect others?
Often yes. Information sharing. Some states coordinate. Proactive multi-state VDA after single-state trigger common.
What about Amazon FBA sellers?
Amazon reports to states. FBA inventory creates physical nexus. Economic nexus if thresholds met. High audit exposure.
Is ignoring the letter an option?
No. State will assess default. Garnishment, liens follow. Engagement with counsel essential.
Next Steps
State trigger question? 15-min consultation free.