Discount Not Working
The discount code is applicable to all our items, even those that are on sale.
There should be a question asking you about discounts in our Order Summary page, please see screenshot below for your reference:
Just click on the link just like the one inside the red box in the picture and you should be able to enter the discount code there.
Discount Codes could either work on items or shipping.
If you still have issues, we can go in and apply the discount after you have placed your order. Just let us know.