Go to Federal> Wages & Income>>Retirement Plans and Social Security (SSA1099 and 1099RRB) to enter your SSA1099.
You need to go to Federal Review to answer the question for the recovery rebate credit to say that you did not get the $1400 3rd EIP payment. It will then end up on line 30 of your tax return.
However, the IRS sent those stimulus payments out automatically to people who receive Social Security. Are you positive that you did not receive it? Check your online account with the IRS.
https://www.irs.gov/payments/your-online-account
If the IRS says you got $1400 last year but you did not receive it you can have it traced.
LOST THIRD STIMULUS CHECK
You have to file a tax for the year 2021 to claim the third stimulus.
TurbTax will ask you whether you received the stimulus. Say No.
It will add the eligible stimulus as Recovery Rebate Credit
To add 1099-SSA
Then click on the federal review