You can update your Homes Payment Center profile by going to the "Your Account" menu and selecting the "Profile" option.
From the profile, you can update your billing address and password. Your email address is currently synced with your Homes Connect agent profile and if changed will revert back to what's found in your Homes Connect dashboard.
There is a prompt to update your Homes Connect Payment Center password every 90 days. You'll be able to login with your current info up until the 90th day passes, at which point when you login it takes you directly to the password reset page. Once the password has been updated, an email is sent to you with the new password as a reminder.