You will need to use your Promo Code at FullStack Desks by following these steps: Add your favorite items to the shopping cart, then click to log in or create a new account, then go back to the shopping cart interface of fullstackdesks.com and select the items you want to buy. Next, it will jump to the payment page, select Coupon of your FullStack Desks on the payment page, and complete the payment. Also, welcome to this promotion from FullStack Desks on October: Professional Computer Chair Low To $1110.12.