Individuals who file an individual income tax return and have overpaid their tax may choose to donate all or part of their overpayment shown on Line 33 of Form IT-540 to the UNO Foundation. Enter on Lines 2 through 21, the portion of the overpayment you wish to donate. The total on Line 22 cannot exceed the amount of your overpayment on Line 33 of Form IT-540.