I have listed the appropriate steps below, assuming that you are requesting information on how to report taxes paid on a new vehicle in TurboTax.
To enter your automotive taxes go to: Federal Taxes > Deductions and Credits > Estimates and Other Taxes Paid > Sales Tax.
I have also listed below the steps to enter automotive registration fees should you need assistance with those.
Go to: Federal Taxes > Deductions and Credits > Cars and Other Things You Own > Car Registration Fees.