If you provide the IRS with information that helps them collect taxes, penalties, interest or other money owed by someone who has not paid their taxes, you could be eligible to receive a whistleblower award. This award is taxable.
However, you may be able to deduct the attorney fees and court costs you incurred in connection with a whistleblower award from the IRS. This deduction is treated as an adjustment to income, and the deduction amount can’t exceed the amount you received as the award, and reported as income, for the tax year.
This adjustment gets reported on Line 36 of your 1040.