- Addendum can only be created at item level. User will not be able to create addendum at bill level and element level. 

- When added row and delete it during addendum, it will treat as addendum. Please perform add items first before omit the items.

-There is no undo button for addendum

- Opening multiple tabs and clicking "Add Addendum" in both tabs will cause a duplication of addendum file, thus an error will occur at backend. Therefore, please ensure that you are not opening multiple tabs.