Mistyal3,
I have not encountered the Form 1116 Part I line 4a problem, but suspect if you look back to your Schedule A you might find something there or in the mortgage worksheet that is feeding to the Form 1116.
Since you have used TT for so long, you are likely familiar with the Forms vs. Step-by-Step approach. For this, I would try Forms to look for an Forms 1098 (mortgage interest reporting) that may be active. IF (big if) you have no home mortgage interest and there is a Form 1098 with zero reported on it you can delete it. Next, look at Schedule A for interest expense to see what if anything is there and correct it to whatever amounts should be there. If there are any links showing, follow those to see where the information is coming from and if it is correct.
TT on Form 1116 does not show errors prior to filing with the IRS as TT thinks there are no errors whereas the IRS thinks there are. This means the only way you find out if you have resolved the errors is by attempting to efile. Fortunately, TT does not charge for failed efile attempts; I attempted 7 times before succeeding on the 8th try.
After I succeeded I regarded the process as an interesting problem overcome. During the process my view was less benign.
