After you file

It is not "ironic" that your wife's Social Security was $3221.  That is the reason.  As was mentioned 26 days ago, when you entered your wife's W-2, you must have accidentally said it belonged to you.

When you did that, TurboTax did the calculations and the $3221 on that W-2 was "excess" because you said it was yours.

TurboTax can not know if you enter something wrong.