You can change the billing/delivery information for future subscription renewals, as well as credit card information, by logging in to https://account.mycommerce.com/
If you have not requested a password for MyCommerce yet, you should click the 'Request Login/Password' link, after which you get an e-mail with further instructions to activate your account.
Note: Your old license code will remain valid until the next renewal, but when activating the license you must still use the old contact information.
If you need more help regarding your existing order, you can contact MyCommerce support from the following page: