Can I claim state sales tax?

If you itemize deductions you can take a deduction for state income tax paid or state sales tax paid. You can compute the amount of sales tax by adding up your receipts for the year or by using a table provided by the IRS. In addition to this base amount you can deduct sales tax paid on large purchases such as a car, truck, boat, etc. TurboTax will guide you through this process in Deductions & Credits.