You are correct in that their issues was with my education credits. They said that one identification number was invalid. They also said that my education credits were wrong. I attend two schools usually simultaneously, taking one class at a time at each school. So that is less than half-time, but together they might be least half-time; it's hard to tell because one school is on the quarter system and the other school is on the semester system. TurboTax asks if I attend at least half-time for each school, but it doesn't ask (or, maybe I missed it), if both schools together are half-time.
Even though I already paid the difference, I still plan on filing an amended tax return for 2022 after I fix what errors I can fix. The reason I haven't amended it yet is because I am very short on time. This semester, I am taking two classes (half-time) at one of my schools and no classes at the school on the quarter system until next month, when a short-term class starts for the winter quarter.
