How to use coupon code? Support JJsHouse November 29, 2019 09:27 Updated Follow To use your coupon code, enter the coupon code on the Checkout page, and click "Apply", and then place the order. Related articles Can I use more than one coupon code? Why is my coupon code not working? What is the best way to choose my size? How can I pay with Wire Transfer? When will you ship my order after I order it?