Motor vehicle sales tax rates differ greatly within your United Levels. Car tax by state often varies within counties and towns. If you are moving to another state, calculating car tax prior to moving possibly be useful in determining location to decide to purchase. However, if you are trying stay clear of the car tax in your home address, go ahead and get a new home to park your car in because unless you possess a house or inhabit the state in question you risk tax evasion. Car dealers and ...