To add a new adjustment type, or edit an existing one:
Right-click a row and select New or Edit.

Enter the Type ID.
Enter the Description of the Adjustment Type.
Select the Tax Class from the list.
Select the Start Date from the calendar.
Select the End Date, if appropriate.
Check the following as appropriate:
Is Write Off
Is a Charge
Is LEC Billed
Allow Duplicates
Select one or more User Groups to determine which class(es) of users will be permitted to select this Type when adding an adjustment. Not selecting any group makes the Type available to all users.
Click Edit to change the General Ledger Properties. This displays the Edit Assigned GL Accounts window.

Select Inherit or Override.
Select the appropriate GL Account.
Click Save. This returns you to the Edit/Add Adjustment Type window.
Click Save.