@DYS2 , yes for 2021 the tax rate was 6.2% ( employee portion) of a max of 142,800 of wages. So if you are talking about your own SSA contribution you may have been overpaid on your account. Note that your husband being self-employed , TurboTax should have produced a schedule-SE which computes the SSA and Medicare ( SECA ) taxes at 15.3% on about 92% of the net income from self-employment). Suggest that you go over your return and all the schedules to make sure that Schedule-SE was correctly accounted for. That should show whether IRS is correct ( TurboTax made an error ) or IRS is in error.
It is impossible from your post to know whom is correct and/or where the error is. If you need more help ( i.e. after having gone through your return and not having any clarification ), you will need to provide more details -- W-2 boxes 3.4. and also schedule-SE figures ( please no Personally Identifiable Info -- this is a public board) and one of us would gladly work on solving the issue. Note that time is of the essence -- you have to respond to IRS notices usually within 30 days from the date on the notice ( not when you received) to stop other automatic follow-up notices.
pk
