The visual layout is not very appealing. Can the “Have a coupon” text be deleted while keeping the Coupon code field and button?
The same goes for “Coupon Code applied successfully.” Since the coupon code and amount are shown at another part of the screen, there is no point in this.
Also, how can I control the formatting and margins of Returning Customer? The spacing between all four messages is too large and the first and only thing customers should see is to be able to initiate the purchase.
In the 2nd screenshot, I am showing the design and location of coupon code fields that are more common. Is there a way to place it above the total price?