Typically discounts are set up prior to billing, not when posting payments. Can you give us a bit more information on how you are entering the discount? Perhaps a step by step? Since I'm not sure how you are doing it, I'm not sure how to advise you about the message.

Hi Nancy, thank you for your quick response. I am trying to apply a discount when I receive an early payment. When I go to enter payments and select the "Type" of Accounts Receivable Entry as "Discount," the default text in the description just says "Discount." I wanted to change the default description to say "Discount for prompt payment." I just found it under Setup > General Settings > Transactions > Default Descriptions > Discount. I double-clicked on it, but it did not open up a dialog box to change the description. I just realized that I need to click on the description field and then it will allow me to change the description. So, I was able to change the default text for entering discounts. Thank you for your help!

Awesome! Glad to know you got it working the way you want it to!