Follow the steps below to add an adjustment reason code from the master list
Select Customer Setup > Codes... > Remittance Codes.
Click the Add Adj Reason button.
Use the Search field to find the Adj Reason code you wish to add. Or use the Show All button to view all codes.
Select the code(s) to add by checking the box on the left of each code, in the Selected column.
Click the Add button.
Click OK when the "All records inserted." displays.