I go to settings – Custom fields – Sales invoice – New Custom Field.
At Label I insert “Unit ID – From” then click Show custom field as a column and click Show custom field on printed documents.
Now I make a Invoice and at Unit ID - From (Custom Field) I input “DEI 1”.
I then Update and click the Purchase Invoice Tab. The page show the “Unit ID - From”
My invoice do not show it.
What am I doing wrong