Create Return: Goto Order >> Returns >> and click on Create New Return;
Update Return: Goto Order >> Returns >> Find Return >> select a return id for edit;
Create Return: System shows created by as display field, without value.
Update Return: System shows created by as display field with value as 'admin' or we can say user id who created that return.
Create Return: As system won't show any value in the created by because it only display from db record. So we don't need this field to be shown at the time of creation. Create By should not shown on create return.
Update Return: Working as expected no changes required.