New feature added! You can now define a discount on your invoices.
When you're editing your invoice, you have the choice to set a discount. A discount can be by percentage or by amount. You then have the possibility to define the discount amount.
The discount will be subtracted from the subtotal. Obviously, the discount will also be present in your print invoices, invoice accessed by a link, and invoices sent by email.
Look at it in action: