How do I use the purchase of a new car as a deduction

[KatrinaB]

You can take a deduction for the sales tax that you paid if you qualify to itemize your deductions. and you choose to use the sales tax deduction. Please view Turbotax FAQ below for more information about the sales tax deductions. 

https://ttlc.intuit.com/replies/3302003

In order to itemize deductions, you will need to have other personal expenses such as medical and dental expenses, mortgage interest, real estate taxes, unreimbursed job expenses and certain miscellaneous expenses, and charitable contributions. 

Also, the combined total of these expenses must be higher than your standard deduction. For example, if you file single, your standard deduction is $6350 so you would have to have personal expenses that total more than $6350.

Please view the TurboTax FAQs below for more information about itemized deductions on Schedule A. 

https://ttlc.intuit.com/replies/3302335