You’ve probably heard about the recent U.S. Supreme Court decision allowing state and local governments to impose sales taxes on more out-of-state online sales. The ruling in South Dakota v. Wayfair, Inc. is welcome news for brick-and-mortar retailers, who felt previous rulings gave an unfair advantage to their online competitors. And state and local governments are pleased to potentially be able to collect more sales tax. But for businesses with out-of-state online sales that haven’t had to collect sales tax from out-of-state customers in the past, the decision brings many questions and concerns. What the requirements used to be Even before Wayfair, a state could require an out-of-state business to collect sales tax from its residents on online sales if the business had a “substantial nexus” —...