Edit payment method:
Click the blue "Edit" button under the "Payment details" section, then click on the "Manage payment method" link in the pop-up. On the Payment Method page, click on the blue "Edit" button associated with your current payment method. Here you can manage an expiration date on a debit or credit card or remove a payment method. Please note that by removing a payment method tied to your AutoPay, this will also disable your Autopay enrollment.