Apologies, I wasn't very clear I guess. I e-filed 2020 and 2021 return successfully thro Turbo and also paid tax due/tax refund at that time. I now realized that I e-filed incorrectly. (I have to say Turbo's questions were not intuitive - I realized this in 2023 - I made big mistakes in child tax credit and Recovery rebate credit).
So I have to amend 2020 and 2021 returns.
1. I was successful in making 2021 amendment, (1040-X) I was also able to e-file it, I could also see that IRS accepted it successfully.
2. Now I am trying to e-file 2020 amendment (1040-X). Turbo did allow me to e-file without a hindrance, so e-file should be available? The only concern was IRS rejected with some cosmetic errors. So I am trying to correct it and am stuck. Can you please guide me? If I have to paper file, would resend instructions? I will also look at ur link below.
