In the United States of America today there exists a Wild West of eCommerce taxation whereas any state, county, city, or region can declare a tax on eCommerce transactions in such a plethora of ways as to make one’s head spin. As a result, an industry has quickly grown up to directly monitor the ever-growing eCommerce tax laws, regulations, and levies concerning transaction within the USA.
https://www.avalara.com/us/en/learn/guides/state-by-state-guide-economic-nexus-laws.html