Sales tax is typically collected by the dealer when you purchase the car. There are 5 States that do not charge sales tax on vehicle purchases: Alaska, Delaware, Montana, New Hampshire, and Oregon....
Normally, in most States, motor vehicle sales taxes are collected by the car dealership from where the vehicle was bought. The car dealership would then forward the collected sales tax to the...
Legally, you can't. EDIT: You can't if you are supposed to. You can either not buy the item or purchase it from a state that doesn't impose a sales tax, but keep in mind many states also have a "use...