Learn about states that currently enforce non-collecting seller use tax laws and the variations in each state’s law.
Sales tax changes
Ultimate Pennsylvania Sales Tax Guide – Zamp
Avalara Software Company in Seattle
The Tricky 10: States with the Most Complex Sales Tax Filing Rules
6 Differences between VAT and US sales tax - Avalara
Ultimate California Sales Tax Guide – Zamp
The merchant's handbook to online sales tax
Sales taxes in the United States - Wikipedia
eCommerce and US Sales Tax – why companies are automating
Sales taxes in the United States - Wikipedia
Economic Nexus Laws By State Summary
The Definitive Guide to Sales and Use Tax