Here are the steps to do so:
1. In Billing Review, apply the discount to a billing record by entering either the total dollar amount or a percentage to reduce the Net Bill amount. The discount reduces the final invoice amount after taxes have been added. It does not reduce the tax amount of either services or expenses. Proper security permission is required to apply a discount.
Discount by dollar amount
Discount by percentage
The percentage value will be converted to the dollar amount automatically.
This discount will display on the invoice as Discount Applied (shown below).
Discount to pre-tax amount
BillQuick is flexible regarding applying discounts to bill amounts before and after taxes. By default, BillQuick applies a discount after applying the taxes.
However, if you want to apply a discount to the bill amount before taxes, go to Global Settings-Billing screen and select the 'Apply Discount to Pre-Tax Amount' option. When you re-open the Billing Review screen, discount will be applied before the taxes.