I have a professional seller account and I want to make sure Amazon will be collecting and remitting sales tax. By default, tax settings says "All" and then "You have not selected any states for tax calculation. To set up tax calculation for a state, start by adding states from the "Add States" drop-down menu."

Do I need to change this and add the states from the drop down menu? Or do I click MTC Only, so that Amazon will collect and remit? I'm not clear on this for some reason and have been on support twice already. Thank you.