Motor vehicle sales tax rates differ greatly within the United Usa. Car tax by state often varies within counties and locations. If you are moving to another state, calculating car tax prior to moving are going to useful in determining location to decide on. However, if you are trying to avoid the car tax in your home address, go ahead and buy a new home to park your car in because unless you own a house or live in the state in question you risk tax evasion. Car dealers and local motor vehicle r...