it could be legit. did you and your spouse each have a W-2? if the spouse's W-2 wasn't coded as such, then TT would report excess social security which would be a credit against the tax you owed when in fact there was no excess. this would be your input error and not an error TT's could catch.
you have various options
contact turbo tax support or
go to it IRS website and either
click on view your account or
get a transcript of your return (get your tax record)
