Once you have created your coupons and included them in several campaigns or promotions, you can edit the current setting to fit into your organization’s growing needs. To Edit a Coupon, do the following:
From the Left hand menu, navigate to More
Click on “Coupons”
In Coupons page, click on the desired coupon.
In the Coupon Editor you can edit the coupon details you wish to change and click on “Update” to save the changes made.