Motor vehicle sales tax rates differ greatly inside a United Levels. Car tax by state often varies within counties and municipalities. If you are moving to another state, calculating car tax prior to moving will useful in determining location to decide on. However, if you are trying to avoid the car tax from your home address, then go ahead and get 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 native motor ...