Following the TT step-by-step process for answering the questions doesn't inform the user what information TT has entered in Line 3B of Form 1116.
To resolve this question, I went to print view of my tax documents. I then searched for Form 1116 to discover the value in Line 3B. Once I knew the number, I searched the document for this same value and found that it was the sum of two tax credits - one for HSA contribution and the other for a tax. With this knowledge, I was then able to describe the basis for the value on Line 3B.
I think it would be helpful to share this resolution with others.
