Employers – Nonpayroll taxes. File Form 945 to report income tax withheld for this year on all nonpayroll items, including backup withholding and withholding on pensions, annuities, IRAs, gambling winnings, and payments of Indian gaming profits to tribal members. Deposit any undeposited tax. (If your tax liability is less than $2,500, you can pay it in full with a timely filed return.) If you deposited the tax for the year in full and on time, you have until February 10 to file the return.