In BizRunnr, user can set default discount percentage of a particular customer in the Customer profile. This default discount comes in during invoice creation. When an invoice is being created for a particular customer, the default discount (in percentage) for that customer will serve as the line discounts for the items being selected. However, user can modify any of the line discounts based on the need. For example, user can change the discount percentage or set a certain fixed amount as line discount for the selected items.
In addition to line-discount, the application also offers a final discount based on percentage or fixed amount. This option is available at the bottom of the invoice creation pane.