I'm assuming that the problem is that the social security number on the 15400 is your wife's and the one on the 8936 is yours.
The fix for that is to go back to the very beginning of your tax return where you entered the personal information about the two of you. You entered yourself first and then you entered your wife second. You need to switch those two people. So delete the information on the first person about yourself and replace it with your wife's information. Then delete the information about your wife in the second spot and replace it with information about yourself.
That will make sure that her information gets entered on the 8936 and it will match the 15400 and you should be all set.
@anynyheik
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