if you accept money in exchange for goods (or even sometimes services), and are not a registered non-profit, you need to pay sales taxes on the sales Only if y

if you accept money in exchange for goods (or even sometimes services), and are not a registered non-profit, you need to pay sales taxes on the sales Only if you have a point of presence in the same state as the person you're transacting with. The US does not have a national sales tax; all sales taxes are collected by the states. Currently, transacting with a person in another state is considered interstate commerce and is therefore exempt from state sales taxes. There are efforts in Congress to change this, but, for now, you don't have to pay sales tax on a sale you make across state lines.