It can take up to 15 minutes for the code to be emailed to you please check your junk email folders too. Also don’t try to get a new code too soon as it will invalidate the old code and you’ll end up waiting longer.
Please see this TurboTax FAQ for more information if you are having trouble receiving your verification code: https://ttlc.intuit.com/community/security/help/what-if-i-m-having-trouble-with-my-filing-verification-code/00/26499