An amount will be entered automatically in the Discount field of the Receive Payments window if, according to the terms of the sale, a discount for prompt payment is owed to the customer. The amount in the Discount field can be edited. If no amount appears, you may enter an amount.
An amount entered in the field will lower the amount in the Total Due field. The discount will be applied to the sale only if the payment received from the customer closes the sale, that is, if amount paid is the same as the amount in the Total Due column.