I cant finish the last step to file my taxes at the end

If it's an email verification code, are you not receiving the code in your email at all?  In that case, check your email's spam/junk folder to see if it might have ended up there.   You can also change the email address if desired (using the steps below.)   You can go to your settings in your Intuit account and change or verify your email address there if it's not verified.

• In the left menu column scroll way down to Intuit Account.
• Then once in the account choose tab Sign In & Security.
• See if your email address has a tiny link beside it that says "not verified".  If so, click that to verify.
• It may then send a link to your email instead of a code by which you can verify it.
• Perhaps once you verify it there in the account settings, it won't ask you to verify it again when you are efiling.
• But if it does ask you again when efiling to enter a code, be sure to leave the interface open while you retrieve the code by using a second tab, second window, different browser, or your phone to check your email.

If after all that, you still can't resolve your issue, here's how to reach TurboTax Support Mon-Fri 5AM-5PM Pacific.

FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632

If you use Free Edition and don't have phone support, another way to reach them if you have social media is to direct message a Support agent:

https://x.com/TeamTurboTax

or
https://www.facebook.com/turbotax