Adding more info to this helpful advice - before trying any printing I used the "Forms" feature, searched on 1116 - and then checked each of the four forms it found to look for one that had something in Line 3b; only 1 of the four matching forms did.
That said it is not clear why TurboTax plopped the number it did in there. Maybe that is what the [product key removed]hing advice is for, to then search for that number (once you know what you are searching for). But in my case, even then, I think it was the sum of two numbers (IRA contributions for my and spouse IRAs).
Definitely a TurboTax bug, or at best an must-have-feature-that-isn't-implemented-yet.
