From the Order Screen, you can view and delete discounts at any time.  When you place the mouse over a discount record in the payment summary section of the order screen, the discount record will highlight in green.

Click your mouse and a box with two (2) options comes up: Delete and View Details.

To delete the discount, click on Delete. A confirmation message box comes up; click OK to complete.

The discount will be deleted and the balance due will be updated. You can delete discounts from orders in any status.

To view the details of a discount record, click View Details.

The discount details screen displays the information.  You can view discount details on an order in any status.