Motor vehicle sales tax rates differ greatly inside the United Nations. Car tax by state often varies within counties and cities or streets. If you are moving to another state, calculating car tax prior to moving get useful in determining location to buy. However, if you are trying avoid the car tax in your own home address, go ahead and purchase a new home to park your car in because unless or you own a house or inhabit the state in question you risk tax evasion. Car dealers and local motor veh...