Motor vehicle sales tax rates differ greatly in your United Usa. Car tax by state often varies within counties and municipalities. If you are moving to another state, calculating car tax prior to moving possibly be useful in determining when and where to own. However, if you are trying to avoid the car tax from your home address, go ahead and buying 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 ...