There are easy steps to resolve this. You have to leave the window open that asks for your verification code open, or it will invalidate the code. But, when you check your e-mail on the same device it sometimes closes the window.
I recommend opening a separate browser for your email and then a new browser for your TurboTax account. Then make sure you have deleted all previous code request emails so that the next one is the freshest.
https://ttlc.intuit.com/replies/4576376
Here is a way to get your 6 digit code from TurboTax for multi-factor authentication. Texted to you:
I am not able to access my account as of today. Calling is not working the website is not letting me log on and I've tried all of this and now it's say my number isn't recognized and there is not an account associated with my phone number. Why is this my accounts have a lot of money in them that I am not able to access. I just received my daily balance notification this morning and used my card fine this morning now o am not able to do anything with it. Can you tell me what is going on? Ifc about the stimulus I care about the money I had in my account and in my vault. I need access to my account now.