If you're entering correct User ID and password, it sounds like some kind of cookie/cache problem or some other browser idiosyncracy.
What browser? Have you tried a different browser??
If the problem occurs with a different browser, then here's how to reach TurboTax Support tomorrow:
Hours are 5AM-5PM Pacific (8AM-8PM Eastern) Monday-Friday.
FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
