...
Create charge(s) first, then services.
The names, descriptions, and category tree organization of charges are visible and prominent on customer bills. Keep this in mind when naming and organizing charges.
Only serviceIDs and service catalog item names are used to organize charges in the Services section – service category/folder organization isn’t visible.
Charge (catalog item)
Add
...
You can add, edit, and remove expense and revenue object codes in Admin > Billing > Object Codes.
...