On codecanyon and here i saw that in the help folder should be a explanation to make field not required but in the documentation there is no explanation about that. I want to remove the field for Payment status, but when i remove it and make a invoice i get error status is required.
If you are asking for v3 then, please check the help folder or online docs at https://tecdiary.github.io/sim-guide/#removing
You need to modify the i) view file, ii) the controller and iii) the table column.
If you are not sure, you can hire any developer to help you.