In EasyBilling, you have the option to include a discount field on the total amount of an invoice. If you wish to apply different discounts to various products within the invoice, you can enable the discount column in the line item table.

To enable the discount column, follow these steps:

1. Go to menu “Customize Document > Document Columns > Invoice
2. In the popup windows, check the box labeled “Discount %” and specify the desired width for the discount column.
   
3. Click the “Save” button at the bottom to apply the changes.
4. Once completed, you will notice the discount column added to the line item table in the invoice window.
   

Furthermore, you may adjust the order of columns in the line item table by navigating to the “Customize Document” menu and selecting “Document Columns Order”