The only 6 digit code I know of is an IPPIN - it that what it is asking for? Where is it asking for that?
User appears to be asking about the 6-digit email verification code that some Online users get as they try to efile if they hadn't previously verified their email address.
FAQ: What if I'm having trouble with my filing verification code?
If that's not helpful, please phone Customer Support.
Support hours are 5AM-9PM Pacific (8AM-12 Midnight Eastern), 7 days/week
FAQ: What is the TurboTax phone number?
My email has been verified, (it even says so on my profile settings), and have been using turbotax for several years. Efile requires a code sent to the email for verification purpose. Those that have or are going through the process of efiling will understand this code I am talking about. Have been on the phone with support and they can't fix it as it seems to be more technical than they can help with. Basically, tough luck is what I got.