In the event an Adjustment Code is no longer in use, you can inactivate the code to prevent staff members in your office from using it; there is no way to permanently delete an adjustment code.
Follow these steps to inactivate an Adjustment Code.
Select Customer Setup > Codes… > Adjustment.
Use the Search field to find the adjustment code by searching for the code name or description. Or use the Show All button to view all codes.
Select the Adjustment Code you want to make inactive.
Please a check the Make this code inactive checkbox.