My apologies, I think I misunderstood your original post.

Just so you know, 2 factor authentication would not include email as that would only be something you know along with your password (something else you know). So two things you know is a single factor. The second would need to be something you have e.g. your phone/key fob, or something you are e.g. eye or fingerprint. 

That's is why you don't see email as an option in MFA (multifactor authentication).

I realize other companies may provide a way to do this with email, but it is not considered secure enough to qualify as MFA. Intuit has to follow the guidelines the IRS provide in this matter.

See https://www.irs.gov/privacy-disclosure/multi-factor-authentication-implementation for more information concerning these requirements if you're interested.

Unfortunately our current solution is limited in this configuration. 

Regards

Brian