How do you have a Social Security overpayment? You mean your employer took out too much ss tax? How much is on your W2 box 3 & 4?
You only get excess SS back if one person had more than 1 employer and those employers took out more than the max of $8,537.40 (for 2020). Check 1040 Schedule 3 line 10 for it. Then Schedule 3 goes to 1040 line 31.
