Master U.S. sales tax: 10 states with the most complex filing rules

Sales tax regulations can vary significantly across the 50 states, creating challenges for businesses. This guide is specifically crafted for businesses dealing with or filing returns in Arizona, California, Colorado, Florida, Illinois, Louisiana, Missouri, New York, Tennessee, or Texas — the 10 states with the most complex sales tax systems.

Leveraging expert support can ease compliance and reduce risks. Avalara Returns can help reduce the hassle of sales and use tax. It automates the entire process — filing, payments, and more — helping ensure everything is more accurate and efficient.

In this guide, you’ll learn about:

• Challenges faced in the 10 trickiest states
• Detailed sales tax regulations for these states 
• States that generate the highest sales tax revenue
• States with the most complex nexus requirements