From the Manage Subscriptions tab look to see if the subscription you’re concerned about is still active. If you failed to update your billing credit card before the subscription renewed it may have expired and your only option is to re-purchase the subscription.
If your subscription is still active, click on the link Update Payment Method. From here you can provide new billing credit card information and billing address information. You will not be able to view your previous card information for security reasons.
NOTE: updating the billing information for any active subscription updates your billing information for all other subscriptions. If you want separate billing for some subscriptions you will need to create a separate account for each.