Yes, there is Foreign Income on 2016 return, and Foreign Tax Credit that was totally used up leaving a tax due for that year. And by the way, am not Amending, am filing back year taxes all at once.

You are right, that the Carryback number shows up on Line 10 of Form 1116. But it is linked to the Carryover worksheet. And on that worksheet is where am having trouble creating a Carryback. It's all made for Carryforward.