your husband's social security taxes on his self-employment income would have no effect on the social security taxes taken out of your wages. if you got a w-2 from 2 different employers, it's likely that your social security taces were over-withheld for which you properly received credit on your 1040. in Turbotax are you sure you indicated that both w-2's were for you. by default Trbotax will use the taxpayer. so if you did this is an IRS glitch.
regardless you need to respond timely.
I'll give you 3 options. you could try calling the IRS but its phone lines are so tied up only a small fraction of those calling get through.
write a letter back with the notice stating that you disagree with the IRS determination. both w-2's are mine and are from different employers. the total social security taxes withheld were $xxxx.xx while the maximum that should be withheld for 2021 is $8853.60. therefore I properly claimed a credit on schedule 3 line 11 in the amount of $xxxx.xx. please adjust your records accordingly. enclose copies of w-2
sign and date. mail by a method where you get proof of delivery.
or
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