This may be too late for you, but I hope it can help others. There is indeed a way to recover unsaved data. My solution is Mac-specific but there is surely a similar path for Windows.
I just had what seemed to be your same issue. I had a long session in Turbotax 2024, but somehow forgot to ever save my data. A sudden power outage left me in mild panic mode (mild, because all I might have lost was data entry time).
I was not able to get this clearly addressed in the archives of this forum, but managed to resolve it myself and thought it was worth adding to this thread.
I found a file Library/Autosave Information/Unsaved Turbotax Document. I moved it to an area in my Documents folder, renamed it, launched Turbotax and opened the file from the File menu. Bang! I had my fully recovered tax data. [BTW, I originally tried double-clicking, but Turbotax just seemed to open to a blank screen. I next tried opening it in Turbotax, but nothing seemed to happen.]
My search here for phrases like "recover from crash", "unsaved data" or even "autosave" came up short. I merely did a Spotlight search for ".tax2024" and found the file. I suspect a similar search would work on Windows.
