Motor vehicle sales tax rates differ greatly in your United States. Car tax by state often varies within counties and urban centers. If you are moving to another state, calculating car tax prior to moving will useful in determining where and when to buy. However, if you are trying to stop the car tax in a home office address, then go ahead and buy a new home to park your car in because unless or you own a house or live in the state in question you risk tax evasion. Car dealers and native motor v...