@Luckcbpb
If you are using the desktop software....a "$0" that can't be changed, and not just a simple "$", indicates there is a "Supporting Details" worksheet attached to that field (at least on a Windows desktop).
Double-clicking on the field will usually bring up that worksheet, and you can either enter your amounts on the worksheet....or there is a big red X at the top of the sheet to delete the entire worksheet, and get access to the normal entry field again in the interview.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*