To easily update your shipping address in your account, make sure you're logged in and go to My orders. Click on Manage Subscriptions then Address and shipping information. Click “Edit.” You can then select a shipping address from your saved addresses on your account, or deselect the “Use an existing address” box and manually enter your new address.
NOTE: Changing your shipping address may affect the monthly shipping cost. These costs are set by the USPS and vary from state to state and country to country.
To update your billing information, make sure you're logged in to your account and go to My orders. Click on Manage Subscriptions then Payment information. Click the “Change Payment Information” button and you will receive an email that will help you to securely update your credit card information. You can also update your billing address in the Payment information section.