Solution or Workaround
Within the invoice entry details, each item has a value for Discountable. The value can be set up to default to either Yes or No.
To change the Discountable option:
1. Select A/R Setup from Accounts Receivable
2. Select Items
3. Discountable is an option based on each item, select the specific item then check/uncheck Discountable
4. Click Save