Are you referring to the emailed verification code during e-filing? If so, please see the below TurboTax FAQ for assistance:
https://ttlc.intuit.com/community/security/help/what-if-i-m-having-trouble-with-my-filing-verification-code/01/26499
If that doesn't work, please reach out to Customer Support via the Contact Us link below:
https://support.turbotax.intuit.com/contact/