Tennessee collects a 7% state sales tax rate. There is a maximum tax charge of 36 dollars for county taxes and 44 dollars for state taxes. In addition to taxes, car purchases in Tennessee may be subject to other fees like registration, title, and plate fees. You can find these fees further down on the page. The Tax Cuts and Jobs Act modified the deduction for state and local income, sales and property taxes. If you itemize deductions on Schedule A, your total deduction for state and local income, sales and property taxes is limited to a combined, total deduction of $10,000 ($5,000 if married filing separately).