I really appreciate your response.
I went back through the Foreign Tax Credit interview but did not revisit the individual foreign tax entries. It told me I had used Simplified previously, and I must use it again (unless IRS permission) and ask if I wanted to use it again. I said yes. It then asked for carryover data, so I manually copied from 2022 Form 1116 Part III line 14 and line 24 as the Foreign Tax Credit Carryover 2022 foreign taxes and amount used. I do same for the 1116 AMT (although I didn't get hit with AMT last year or this year). At that point, everything works out the same as before the transferred from last year disappeared.
As a further sanity check, I started a new blank return and transferred from last year. The carryover numbers were properly filled in matching the entries I had made. So I think I'm good.
I hear your warning about forms mode. Shame on me, but I work primarily in forms mode but I now know that my 1116s were not as simple as they could have been if I had been using interview. Lesson learned. In fact, where I lost the transferred data was when I deleted my Forms 1116 and then ran interview to consolidate all RIC instances to one "country".
A side question here is if there is a place to view the transferred data. The Federal Carryover Worksheet doesn't have FTC carryover.
