On the homepage of the website, you’ll see a ‘Log In" link in the upper righthand corner. Click that link to see the details of your account, including the status of your subscriptions, when the next payment will occur, the billing and shipping addresses on file, and the saved credit cards in your account.
To add a new credit card to your account, on the ‘My Account‘ page under the ‘My Subscriptions’ section you’ll see ‘Change Payment Method’ listed under the ‘Actions’ column:
Click the ‘Change Payment Method’ and you’ll see the credit card that’s on file and an option to add a new card. Select the ‘Use a New Credit Card’ option, and enter your new card’s information. Click the ‘Change Payment Method’ button at the bottom when you’re ready to submit the new card information.
To delete a card you have on file, click the ‘Manage Saved Cards’ link (shown above) in the ‘Change Payment Method’ section. Your saved cards are also shown at the bottom of the ‘My Account‘ page.