Pro tip: Click here to go to 'Your Orders' on Amazon and update your payment method. Find the item you want to change your information for and update the details.
The best way to change your Amazon payment method after placing an order is by going onto your Order History. Here, you're able to easily access your information. Update your payment method, gift options, delivery address, and more.
The payment options available on Amazon are Credit or Debit Card. Changing from one payment method to the other is simple. It's necessary if you prefer to use a different card from the one you're using.