Sales Tax Compliance for E-Commerce & Online Sellers
These guides are for e-commerce businesses and online sellers who need clear information about sales and use tax in every state. We help you determine where you have nexus, how to comply with marketplace facilitator laws, and how to prepare for audits and disputes.
Why This Is Complex
The 2018 South Dakota v. Wayfair Supreme Court decision changed everything for online sellers. Economic nexus laws now mean you can owe sales tax in a state without ever setting foot there — based solely on your sales volume. With 45 states plus D.C. collecting sales tax, the compliance burden for online sellers has never been higher.
Common Issues We See
- ✓Economic nexus thresholds by state (typically $100K or 200 transactions)
- ✓Marketplace facilitator laws — when Amazon, Etsy, or eBay collects on your behalf
- ✓Taxability of digital products and SaaS
- ✓Managing exemption certificates from B2B customers
- ✓Multi-state registration and filing requirements
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