@jltllt if your only income is social security, then is would be mathematically impossible to be required to file.
If you both received the maximum monthly payment available of $5,108 per month per recipient, that would be $122,600 of social security income for the year.
Because of the formula defining what portion of that is subject to tax, only $20,700 would be subject to tax. And since that is below the standard deduction of $34,700, there would be no FEDERAL filing requirement. State requirements may vary.
I assume you would file JOINT, both are over 65 years old, there are no dependents and you do not receive medical benefits from the Marketplace (i.e. you are on Medicare).
