Thank you for the guidance! I had to make a nominal change (and later change back) my 1099-DIV entry for foreign tax paid under the income section during the amendment to trigger the availability of prompts in the online 2024 amendment of foreign tax credit. After that, prompts which did not appear before in the existing foreign tax credit section appeared.
I then do get to the question "Do you have a carryback from 2025?" The amount on my 2025 return, form 1116 schedule B line 7 "Actual or estimated amount of line 6 to be carried back to prior tax year (enter as a negative number)" is indeed negative. Question 1: It is unclear if the carryback amount should be entered as negative in response to the question in the 2024 amendment prompt asking for the carryback amount. It seems like entering one way will trigger another carryback and require amendment of the 2023 return I also filed with TurboTax, where at least I did not have foreign tax paid that year or any year prior. Entering the number as either negative or positive leaves me with a new tax liability for the 2024 amended return. So my second question is does carryback mean carryback of credit, or of liability--or have I done something wrong?
A final question is how to determine if the carryback is standard or alternative minimum tax (AMT) type. When completing my 2025 return, the prompts in this credit section led me to choose the option which said something like "this is my first year claiming the simplified calculation for AMT", but I never saw any indication that a tax filing for AMT was completed. My 2025 return is a form 1040 as filed. I chose the same option in the amendment of 2024, for consistency, and 2024 would truly be my first year of claiming a foreign tax credit (unless this amendment triggers an amendment for 2023).
