Here are the steps on how to use Promo Codes when shopping at thesmartesthouse.com: You need to log in to your existing account at thesmartesthouse.com or create a new account of your own; then, to select a product, you can browse the thesmartesthouse.com product page to select a product and add it to your cart. Occasionally, they will offer you discounted products up to 70%. Then, click the Calculate button, and finally jump to the payment page, you will see the information of [Select your Coupon Codes], click to select the Coupons you want to use, and then return to the payment page to continue to complete the payment. Please note that used Coupons will be automatically removed from your coupon.