Anow now supports negative numbers in the fees & costs area. These will automatically be deducted from the original amount.
To get started, click into an appraisal from your dashboard, and check out the fees and costs section on the right.
Create a new line item by clicking
Enter your discount name, make sure the amount has a '-' in front of it, and make sure it's set to bill to client.
Then click Save. You will see that your Receivables column has been updated to reflect the discount. These numbers will also be calculated properly when you generate an invoice!