I don't have access to my registered phone number. I need QuickBooks to update my account to use my email address instead of phone number for authentication.

Hi jjaudiocanada-gm,

Welcome to Community!  Ensuring you're able to access your QuickBooks Online account from anywhere at any time is a vital part of your day.  When your sign in credentials need to be updated, so you can get back to business, we can help!

Please follow this link and complete the required fields, so we can update your information from our end.  This will be processed within one business day.  Look for an email from no_response@intuit.com with any other steps that need to be taken, so you can access your QuickBooks Online account without further delay.

If you have any other questions, please don't hesitate to reach back out.  We would be glad to help!