If you're looking to update the contact information for your account you can do so directly from the Dashboard.
Step 1 - From the Dashboard click Account Info
Step 2 - Update contact information
Step 3 - When finished, click Save
Keep in Mind:
- The email address on file will be the address that's used for password resets and any type of verification for your account.
- You can update the Billing Contact from your Billing Center. Check out the article for that here.