Form 1116 Explanation Statement

I have gotten to: "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."

 

It seems strange to me that I am being asked to explain a number that Turbo Tax calculated and entered.  Have I confused the program or is this normal? 

 

I have figured out that the number is the sum of: "Deductible part of Self Employment Tax" and "Self-employed Health Insurance Deduction" So is that what I should put in the explanation?