After you file

I have never entered anything in an "excess Social Security" line item before.  It doesn't show up on my 2013 returns, nor my 2015 returns.  I called the irs and the person i spoke with said that line 44 is the sum of boxes 2, 4 and 6 from mine and my wifes w-2's.  According to the 1040 form, created by turbo tax, that amount in 2014 was $27,427.  If i add mine and my wifes boxes 2, 4 and 6 from our 2014 w-2's, that adds up to $38,024.  That is why I need to know how turbo tax came up with my line 44 being $27,427 instead of $38,024.