Motor vehicle sales tax rates differ greatly inside the United Tells. 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 useful in determining when and where to find. However, if you are trying stay clear of the car tax away from your home address, go ahead and buy a house to park your car in because unless your very own a house or live in the state in question you risk tax evasion. Car dealers and loc...