Not necessarily, usually the taxes are just a percentage, and it won’t change much from place to place. Even within the same state different counties, towns, and cities have taxes that’s pile on top of each other. So in one area you might pay 5% tax at a restaurant, and at another you pay 7%. Some chain restaurants like to charge even numbers, so they just set a price that covers the tax in all of their regions. It’s rare to see a chain store do this though, and usually only done in places where they expect you to pay cash.
Online sales are complicated, taxes are tacked on at checkout once they have your billing address (I think), and even then I don’t know how they charge it. Sometimes when I order something on Amazon I pay tax, sometimes I don’t. No clue how that works.