To change your account settings: In Your Account, go to Login & security. Next to the account information you'd like to update, select Edit. Follow the on-screen instructions and select Save Changes. After you've completed all your updates, select Done.
How-to: change the email address linked to your Apple ID Feb 27, 2017 How do you change my email address on my iTunes account To change an email address on an iTunes account simply log in to the account and click on the Edit Account Info button and type the new address into the appropriate box.
How to change the email address linked to your Apple ID
How Do I Change My Apple ID On My iPhone? The Fix! Dec 07, 2015
Change your Apple ID. Learn how to change the email address that you use as your Apple ID. In most cases, your Apple ID is also the primary email address of your Apple ID account. You can change your Apple ID to any other email address you control, as long as it's not already in use as an Apple ID.
Apr 22, 2018 How to Login and Change Billing Address in iTunes Account?