Hello @SRobins ,
I'd advise going through this article on updating your account settings, which covers the areas you'll need to update account elements for. Please be aware that some of the account elements, especially billing settings, can only be edited while logged in as the account owner. If you're needing to update email addresses associated with the account, make sure the email you're switching to has been verified for your account.
See also:
Removing verified addresses
Transferring account ownership
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