I am filing some back year taxes for a foreign client of mine. So far am  not needing to use the Exclusion.  So there's nothing to revoke.

But if for instance tax year 2016 has a tax due, and 2017 has FTC carryover. I will like to use that excess tax credit from 2017 on the 2016 tax due. how can I do that in proseries?

Thanks