First, confirm whether you have an account in Smashbox. If not, you can create it first. Then select your favorite Smashbox product and add it to the shopping cart. Click the calculated button, and finally, jump to the Smashbox payment page. After clicking, you can select the Smashbox Coupon Codes you need to use, and then return to the payment page to continue the payment. It should be noted that the used Smashbox Coupons will be automatically removed from your Promo Codes.