When running your own e-commerce website, you’re entirely responsible for every aspect of sales tax compliance. This includes determining where you have nexus, calculating accurate sales tax rates across over 11,000 jurisdictions, collecting the correct tax at checkout, filing returns in each applicable state, and making timely payments.

This is significantly more complex than selling on Amazon. Most sellers use automated solutions like Avalara or TaxJar to integrate with their e-commerce platform, automatically calculating rates and managing compliance. Attempting to handle this manually is extremely difficult and error-prone given the complexity of multi-state tax rules.