With ecommerce, catalog and other merchants still wrestling with the impact of the U.S. Supreme Court’s June 2018 Wayfair decision, some states are retroactively seeking sales tax from out-of-state online sellers.
California, South Carolina and Louisiana are separately seeking taxes as far back as five years. South Carolina is targeting Amazon’s third-party remote sellers, and Louisiana is doing the same with Walmart. Legal challenges are underway in both southern states.
Source: multichannelmerchant.com