Motor vehicle sales tax rates differ greatly within 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 will useful in determining when and where to own. However, if you are trying in order to avoid the car tax in a home office address, go ahead and buying a house to park your car in because unless you own a house or live the state in question you risk tax evasion. Car dealers and local motor v...