- Sales Tax Permit & Business License Guide
- What Is a Seller’s Permit?
- How to Get a Seller’s Permit
- Seller’s Permit Requirements
Browse state-by-state guides for sales tax permits, seller’s permits, resale certificates, and tax ID numbers.
Key Takeaways In 2026, tracking nexus requires monitoring both physical presence triggers and economic thresholds (often based on annual sales or transaction counts). Use a state-by-state nexus log that captures dates, threshold metrics, marketplace activity, and registration/filing status to avoid late-registration exposure. Assign owners for data inputs (sales, shipping, inventory, payroll) and review nexus at
Browse state-by-state guides for sales tax permits, seller’s permits, resale certificates, and tax ID numbers.