Check your email's spam/junk folders. Or try a different email address in your account settings.
Also see this FAQ:
FAQ: What if I'm having trouble with my filing verification code?
https://ttlc.intuit.com/community/security/help/what-if-i-m-having-trouble-with-my-filing-verificati...
If that's not helpful, please phone Customer Support.
Support hours are 5AM-5 Pacific (8AM-8PM Eastern), Mon-Fri
FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
