I don't understand your question.
1. If someone filed a tax return in your name using another service, Turbotax would have no way of knowing about it or stopping it. The IRS would be expected to reject the second e-filed return, whoever that was, but the IRS won't release details of your tax return to anyone else, even for purposes of identifying fraud.
2. If someone gained access to your account through your password, there should have been an attempt to verify your identify through 2factor authentication, by sending a verification code to your mobile phone or email address. If a crook had access to your email account or phone as well as your password, there's no way for Turbotax to know it wasn't you.
3. If someone made a new Turbotax account in your name (but with their password) and the taxpayer name and SSN matched an account that already existed, Turbotax has no way of knowing whether this is a fraudulent return, or you decided to make a new account for some reason. When that account tries to e-file a return, Turbotax sends an email to the older account with the same taxpayer name and SSN, asking if the new account is really you. But, under IRS regulations, Turbotax can only place a hold on the new return (which might or might not be you) for 48 hours, after that, they have to send it to the IRS. If there was a fraudulent return sent via a new Turbotax account set up by a crook, and you didn't get the email (because your address is wrong in your account settings, or the email went to a spam filter, or you got the email and ignored it) then the fraudulent return would have to be transmitted after a 48 hour hold.
For more information you can call support and ask to speak to account security. https://ttlc.intuit.com/replies/3300041
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