You will need to use your Promo Codes at Doterra by following these steps: Please log in or create an account with doterra.com, then select a product. If you don't have a shopping idea, e-coupon-code.com has 24 promotions for you to check out. Then place an order, click the Coupon Codes obtained on the settlement page, you will automatically jump to the existing Coupon Codes page, select the Coupons you want to use, and complete the payment.