Sales taxes in the United States are taxes that the government collects when people buy something. The government takes the taxes the people pay and uses the money to pay for things like schools, roads, and other things that people need. When people buy something, they usually have to pay the sales taxes in addition to the price of the item. The amount of sales tax you pay depends on what state you are buying from and also on the price of the item. Different states have different sales tax rates, so the amount you pay could be different from one state to another.