Pro Tip: Click here to access your orders. From there you can change your payment method on active orders.
Changing your payment method after placing an order requires that you sign-in to your account and access your orders. Active orders’ payment methods can be changed.
Once establishing access to your Amazon account, click on Returns & Orders or Accounts & Lists in the upper right corner. Then access your current orders. Any orders that need an updated payment method can be changed here.
*** Note that once the order has been shipped, no changes can be made.
You can also change your payment method permanently by going to the payments area of your account. These will not change orders already placed, but it will change future payments.