Happy day...that's true that in your case the amount on the 3804 might not equal the amount paid.  In my circumstance, it is, which is why I noted that it was the trick.  It will be the same for 2022, so I'm good to go.  If a different amount was paid, enter that into 15F and allocate it.  I do not receive a diagnostic saying to attach a file.  I do have an issue with "human name" vs. "trust name" but I'll sort that out soon enough.