When you add an item to the cart, on any page during the checkout process you will find a box for the coupon code below your cart contents, above the payment option buttons. Type your code in the box and press the Apply Changes button. If there is an issue with a valid coupon code, call us at 888-742-3404 and we will either give you a new code, fix the old one or take your order over the phone. See our Coupon Policy.