Online TurboTax autosaves -- desktop does not "know" to save unless you save it, so I had to ask.
You can try calling customer support to see if they can help you recover the file--maybe it's buried there somewhere.
To call TurboTax customer support
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
They are available from 5 a.m. to 5 p.m. Pacific time Monday - Friday
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
