1. In Accounts Receivable, create a new Invoice on the Activity tab for a Client.
  2. On the Line Items tab, click New Line Item.
  3. Select Per Usage Item (or Product) in the Category field.
  4. Enter all required information, then add the desired Percent Discount (% Discount) in the Quantity/Price grid.
  5. Save and Close the Line Item.
  6. Save and Close the Invoice, then Save and Close the Client record.