That problem won't exist; you may still find differences between the states, but that's it. Only the states set the categorizations for sales tax on remote sell

That problem won't exist; you may still find differences between the states, but that's it. Only the states set the categorizations for sales tax on remote sellers. This harmonization of a state's sales and use taxes into a single set of rules managed by a single entity for remote sellers is one of the requirements of the bill.