Step #1 was setting up a Discount Coupon Sales Item. 

The following is step #2 in setting up a Discount Coupon.

Tip: Save time by creating one Discount Coupon (Coupon Code) that is good for all of your Retail/Flex washes, or for all of your Club Sales Profiles; however, the same Discount Coupon cannot be used for both the Retail/Flex washes and Club Sales Profiles.

After you have added the Discount Coupon PLU, it will need to be assigned in a Discount Coupon Profile.  Follow these steps to assign the Discount Coupon to your Discount Coupon Profile.   

To create a separate Profile for the Discount Coupon Code, follow these steps:       

1. On the Configuration menu, click Goods and Services, and then click Profile.        
2. In the Profile toolbox area, click the Add button.
   The Profile dialog box appears.
3. In the Profile box, type a name for the Discount Coupon Profile.
4. In the Device Type box, select a device type.
5. In the Devices box, select one or more devices.
6. In the Service Type box, select Discount Coupon.
7. From the Services toolbox area, select the Add Discount Coupon button.

8. From the Discount Coupons section, select all Discounts that apply. (Only those Sales Items defined as Discount Coupon will be available for assignment.)
9. Click OK.
10. Click the Save button. 
    The message "This profile is not enabled do you want to enable it at this site" appears.
11. Click Yes.

The message "Profile saved successfully" appears.

12. Click OK.

The discount coupons are assigned to the new profile. 

Next step, a schedule must be assigned.

See Add a Schedule.