The problem here is that you haven't gone far enough into the "Foreign Taxes" interview. Right at the front end of this interview TurboTax asks questions about foreign taxes reported on 1099-INTs and 1099-DIVs and does so, I assume, because these foreign taxes are relatively common. After that bit of the interview TurboTax broadly asks about foreign taxes originating from other activities and it's someplace "deeper" into the Foreign Taxes interview where you'll tell TurboTax and the taxes paid on your capital gains. This part of the interview requires your close attention as the interview in this area pretty much simply follows Form 1116. Read the screens carefully and click through to the "On Demand" tax guidance that's available.
