Sales taxes that you pay are only deductible on your tax return if you itemize your deductions on Schedule A. If you file a Form 1040, and itemize deductions on Schedule A, you have the option of claiming either state and local income taxes or state and local sales taxes. (You can't claim both.) If you saved your receipts throughout the year, you can add up the total amount of sales taxes you actually paid and claim that amount.
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