After you have added your items to the shopping cart, the discount code is entered on the checkout page. You have to fill in your address first, continue with the next steps until you reach "Payment". You will find a gray field with "discount code". You have to press the button with the arrow to see the total update of the order on the entered discount code. Please apply your discount code before placing your orders. We are unable to update your order or issue a discount refund after the order is placed. If you are still unsure how to proceed, please contact us by email firstname.lastname@example.org.