I don't have TY2018 installed yet, but the following is from TY2017 which might solve the problem.
To ensure a clean start, delete f1116.
If you are asked to fill out form 1116 and you don’t need to, here is a
technique to override it. Go to the foreign tax credit interview and when you
start, here are the screen headers and the responses.
1. Foreign tax credit
Continue
2. Tell us about your foreign taxes.
Skip the foreign tax credit.
3. Foreign Taxes
Continue
TT will exit the interview and the credit should appear on line 48 of the 1040.
