rbynaker
Level 13

My guess is you're trying to defer taxes that were already paid.  You can reduce the amount due and defer payment to 12/31/21 and 12/31/22 but you can't increase a refund by taxes already paid.

From the 1040 instructions to Schedule 3 (2020 PDF page 100😞

"If you file Schedule H or Schedule SE, you can defer some of the household employment and self-employment tax payments you may owe on your 2020 tax return and pay them later instead. However, you can't defer amounts that you have already paid."

Rick