Motor vehicle sales tax rates Porn greatly while in the United Usa. Car tax by state often varies within counties and cities or streets. If you are moving to another state, calculating car tax prior to moving will be useful in determining to view the leonids to own. However, if you are trying to avoid the car tax in your own home address, then go ahead and buying a new home to park your car in because unless you own a house or are in the state in question you risk tax evasion. Car dealers and lo...