On the Form 1040, Line 6a is the amount of the SS benefits received as reported to you on Form SSA-1099 box 5. On Line 6b is the amount of the SS benefits that is taxed.
Up to 85% of Social Security Retirement/Disability/Survivors benefits becomes taxable when all your other income plus 1/2 your social security reaches:
IF line 6b was a zero...then we've seen some folks who mis-answered a follow-up question for the SSA-1099, where the taxpayer accidentally indicated a YES to say they were living in certain foreign countries, where the foreign country they were living in was taxing the SS instead.
@tony-hallo365 You get 0 on 6b if you didn't answer the Foreign question right. Or if the amount on 6b is too low and you are married you answered it wrong for one spouse.
There is a new question this year asking if you lived in a foreign place. People have been answering it wrong or skipping it. Go back through the Social Security entries and check, check for each spouse if married. If the IRS adjusted your return you do not need to amend.