Are you married and filed Joint? And you both had W2s? The IRS is probably right. They usually are in this case. You assigned both spouse's W2 to the same person so it looked like that person went over the max.
For 2020 Do you still have copies of all the W2s? Look at box 4. Did either of you have more than 1 employer? 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. So add up your W2 box 4. Is it more? Then add up your spouse's W2 box 4. Is their box 4 more than $8,537.40
Or check W2 box 12. You may have entered Code A by mistake.
Or post back with the amounts in boxes 3&4 on each W2 for each spouse.
