The place to enter a promo code (i.e. discount code) is during the 'Payment Method' portion of the Checkout process. On the final step during Checkout, when you're prompted to choose a payment method, you will see a box titled "Gift card or discount code". Type or paste the code and click Apply. (Please note the correct spelling & expiration date of the promo code to avoid issues with it not working).If you went ahead and placed the order and either forgot to enter your code or could not find the box to enter it,email us at help@madebycleo.com (within 24 hours) and we'll be happy to assist you with applying the discount credit to the order you already placed.