Motor vehicle sales tax rates differ greatly within the United Nations. Car tax by state often varies within counties and municipalities. If you are moving to another state, calculating car tax prior to moving get useful in determining where and when to decide on. However, if you are trying to stop the car tax in your home address, go ahead and buying a new home to park your car in because unless you own a house or inhabit the state in question you risk tax evasion. Car dealers and local motor v...