Log in > Click Sign in & Security from menu > Click "Email address" (https://accounts.intuit.com/app/account-manager/security/email).
On the page above, if I enter my new email address, I'm signed out. I verify my phone and log back in. I get redirected back to the /email page where I left off. My email address is not updated. So I enter my new email address again. I get kicked out again. I log in again. My email address is not updated. Repeat.
