Can tax amounts set via tax codes be overridden? Things like bills for office groceries where food/produce might be taxed at different amounts but it’s difficult to split them out since you only get a single receipt with the total amounts.

Yes you can override the tax amount field..

It’s greyed out/locked out for me. Is there a setting that controls that? I don’t think any active scripts are setting the field to read only…

USA no...International Yes. Canada maybe..i cant recall

Canada no if you use tax groups. I think you can use tax codes instead though