Where do I enter my promo code? Winston Xie March 17, 2018 04:47 Updated Follow Promo codes are entered during Step 4 of the trip listing process. Related articles Where is Airmule available? I need to edit or cancel my listed trip. What are the chances my trip will get matched with a shipment? Where can I find my confirmation code? How do I know what I'm transporting? Comments 0 comments Please sign in to leave a comment.