No, you do not need to submit a payment method once you have a coupon code. All that is required of you is to click on the “CHOOSE A PAYMENT METHOD” button. A new tab will be opened by your browser where you will see options to submit your preferred payment information.
Scroll down and locate the box “Coupon Code,” input the code, and click on the forward arrow outside the box. You will receive a message welcoming you to the type of plan you are subscribed to. Then scroll down and click on “Subscribe” to gain access to the plan the coupon code belongs to.