Motor vehicle sales tax rates differ greatly in your United Levels. Car tax by state often varies within counties and cities. If you are moving to another state, calculating car tax prior to moving is useful in determining location to decide on. However, if you are trying stay clear of the car tax from your home address, go ahead and acquire a new home to park your car in because unless you keep a house or live the state in question you risk tax evasion. Car dealers and local motor vehicle regis...