You can update your payment information by logging into your account.
Navigate to "Address and payment details"
Select "Manage payment methods"
Edit your details, manage addresses on file or add/manage your payment methods
Click "Save changes"
For those using PayPal, ShopPay, or ApplePay, you will need to edit your payment details by logging into your respective account. Also, if you've recently moved, don't forget to update your Billing Address in addition to your card or other payment information.