@caseyrubin97's solution worked for me. I removed some of my estimated taxes I paid so that I owed money. Went back into the Self-employment tax deferral section, put in my income for Mar-Dec and then put 0 for the amount I wanted to defer. I finished that section and then went back in and added my estimated taxes back in. TurboTax calculated the same refund amount I was owed before I changed anything, so I know everything was still correct.
However, after this happened I got a Line 11 too large error on section 1040/1040SR wks. The amount they had was 0. I took that 0 out and left it blank.. After that, smart check went through with no errors.
