Common Issues
Start with research. Bring in a professional when facts require it.
These pages explain common Washington tax issues in practical terms and point to source material where available. Start with the free tools and research, and if you need professional help, let us know.
Browse by topic
Refunds
Research refund windows, overpayment patterns, and when a professional claim review may make sense.
Audit Defense
Understand audit notices, IDR scope, documentation strategy, and representation triggers.
Washington Nexus Analysis
Review economic and physical nexus concepts before deciding whether to seek advice.
Tax Classifications
Sort receipts into the right B&O, retailing, service, or specialty classification.
Sales/Use & Excise Tax Compliance
Research classifications, local sourcing, exemption documentation, notices, and filing issues.
Voluntary Disclosure
Learn the VDA tracks, eligibility limits, lookback rules, and preparation needs.
Appeals
Research Rule 100 timing, issue framing, settlement posture, and professional help needs.
Letter Ruling
Understand when a DOR ruling can create clarity before a transaction or position.
Legislative / Rulemaking
Track bills, DOR rulemaking, public comments, and effective-date planning.