Form 1116 needs an explanation

In TurboTax Desktop, I have a message saying "Check this Entry": "Form 1116 (COPY 1)-- Explanation Stm: Detailed Explanation must be completed. Enter your explanation here to complete the required statement. It must show the other deduction items for line 3B column a."  If I go to the form, line 3b says "other deductions (attach statement)" and a value of $14000.  On the 1116 worksheet, this is listed as "remaining dedns from gross income".  I haven't the foggiest idea where TurboTax got this number, so how am I supposed to explain it?