1) Make sure you are logged into your account by clicking the "My Account" link at the top right of the window.
2) Add whichever items you would like to your shopping cart.
3) Click the My Cart button toward the top right of the window.
4) Click the View Cart button in the My Cart drop-down (see image below).
5) In the next window there is a box in which enter in Discount Codes. Enter the Coupon Code in the available area and click the Apply Coupon button (see image below).
6) If you get any errors with this please contact us for further help.