On the last page before your click "complete my purchase" there will be two boxes where you can enter your discount codes or gift card code. Once you have entered either of these codes click "Apply". Your total amount will be updated to reflect the discount. Now press "complete my purchase". You cannot enter coupon codes if you click the "pay with PayPal" option or combined with other discount codes and also when signing up for subscriptions as when signing up for a subscription you are already receiving a 10% discount, you have to use the direct checkout feature to enter a code. Please contact us with any problems.