How to add a discount to the invoice total

To add a discount, please create a new item with the discounted amount and then include the quantity as “-1” on the invoice.

Please reference example below:

create a new item, name it “Special discount” and assign price as “$10”
add the new discount item to invoice with quantity “-1”. This negative quantity will allow the calculation to deduct the discount from the invoice total

This example adds a $10 discount to the invoice total.