To modify your billing/personal information from your Xbox 360™ console:
From any area of the Xbox Dashboard, select your gamer profile.
From the Gamer Profile screen, select Account Management. Choose from the following account-management options:
Select Memberships to view your current membership and options for membership renewal. For more information, see Renew Your Xbox LIVE Membership.
Select Contact Information to confirm or modify your contact information, including your physical address (access requires your Windows Live ID and password).