Hello Lynn,
Are you using your school's Canvas server, or are you using the "free for teachers" version at https://canvas.instructure.com ?
There are general instructions for changing your email address athttps://community.canvaslms.com/docs/DOC-13040-4152719740
However, if you are also using your email address as your login name in Canvas, and you are using your school's Canvas server, you will probably need to contact the Help Desk at your school about changing your Canvas login.
If you are using the "free for teachers" version, there will be an "I want to use this address to log in" checkbox when you add the new email address to your account.
Mike
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