If it looks like your ability to enter a discount isn't available on your menu, there's a good chance that the discounts aren't enabled in your Loyalty area. First, just navigate to Configuration tab in your Customer Control Panel and choose any of the options:
Then, from the sidebar on the right, choose "Loyalty Services"
If you don't see Zuppler Discounts listed, just add them from the Add New button on the top right, and choose Zuppler Discounts.
Don't forget to hit the blue Save button when you're done. Your discounts should be active and live at this point. Don't hesitate to reach out with any questions by emailing firstname.lastname@example.org or by calling toll-free: 1-888-987-7537