Thanks @KathrynG3 . I checked all those fields in the form for box 16 (i.e. 16a and both the codes for B&P) and they looked the same as they do on the form from 2019, so I ended up deleting the whole K1 and re-entered it and that seemed to fix it. I was able to submit after that. You must be right, there must have been some other field that was a conflict and the error check was just flagging on the field that was right. Thanks for your help! I'm unblocked now. 🙂
