If you have one of the legacy HSPC accounts, here are the steps to update your billing information.
2. Once logged in click on the "Account" link on the left hand column.
3. Find the "Billing Management" Section
4. Click on the "Payment Methods" link.
5. Click the "New Payment Method" button.
6. Fill in your new credit card information and then click the "OK" button.
7. You have now successfully updated your billing information for your "HSPC" account.