Where do I enter the sales tax paid on the purchase of a new car ?

[xmasbaby0]

SALES TAX

You can enter the sales tax you paid for the car you purchased in 2017 by going to Federal>Deductions and Credits>Estimates and Other Taxes Paid> Sales Tax.  You will be asked if you paid sales tax on a major purchase, and you will be able to enter the sales tax you paid for your new vehicle. 

Sales tax is an itemized deduction.  If your state has a state income tax, you have to choose between using the deduction for your state tax paid OR the sales tax deduction, whichever is higher.  The TT process will suggest one or the other as you prepare your return.

“Major purchases” that you can enter for the sales tax deduction include:

Motor Vehicles (cars, trucks, motor homes, RV’s, sport utility vehicles and off-road vehicles

Aircraft or boats

Mobile homes

Manufactured housing

Building materials for major home improvements

You cannot deduct: furniture, jewelry, home electronics such as TV’s or computers

https://ttlc.intuit.com/questions/1901222-which-deduction-should-i-choose-sales-tax-or-income-tax

https://ttlc.intuit.com/questions/2566624-how-much-sales-tax-did-i-pay-last-year

[Hal_Al]

You are allowed to deduct state & local income taxes OR sales tax; but not both. This provision was added primarily to allow a deduction for people in states without income tax. Sometimes, with a big purchase (like a car), you may be better off deducting sales tax even if your state has an income tax. Enter both, under deductions, and TT will calculate the best option. If you don't have all your receipts (and hardly anybody does), you are allowed to use tables (built into TT from IRS Pub 600) based on income & exemptions, You can then add major purchase sales tax to the table amounts. Neither is deductible if you use the standard deduction instead of itemizing.
In TurboTax, enter at:
Federal Taxes Tab
Deductions & Credits
-Scroll down to:
--Estimates & other taxes paid
   -Sales tax