To adjust an invoice only and not correct or change the rate or package charge on the order:
1. If the invoice isn’t issued yet, then issue it first by following these two steps:
1a. Select the invoice in the list you are viewing (Ready, Pending, Next or Final).
1b. Click on the Invoices menu then click on Issue selected invoices.
2. Select Issued in the invoice status list on the upper-left of the Invoices tab then select All dates.
3. Double-click the invoice you want to edit, click Insert and enter a description and amount on the adjustment shown on the last line then click Print.