In order to enable Order Level Discounts By Role in your store navigate to Discounts Setup screen from the Store Admin Menu and select the radio button option titled “Category Level Discounts” as depicted in the following screen shot:
For more information on the Discount Setup screen, please see the Discount Setup section.
Next, the Order Level Discounts By Role Setup needs to be configured. To configure the Price Class Discounts screen, please see the Order Level Discount By Role Setup section for more information.