FILE- In this Dec. 14, 2017, file photo, packages travel on a conveyor belt for sorting at the main post office in Omaha, Neb. States will be able to force shoppers to pay sales tax when they make online purchases under a Supreme Court decision Thursday, June 21, 2018, that will leave shoppers with lighter wallets but is a big win for states. (AP Photo/Nati Harnik, File)