When you looked in your Intuit Account settings in the "Sign In & Security" section of your profile, did it show an adjacent tag for whether the email address was verified or not? If it says "not verified", you can try to verify it there, and see if it sends you a code or link to your email to verify while in your profile. That might solve in, but see if things then work if it asks again for you to verify in the filing section. If it doesn't work, then you can phone Support per the info below.
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