Same thing happened to me, and mine was completely done. It was completed (in March), saved, and I "printed" it to PDF. Opened the evening of the new deadline to file, was prompted to update — which I did — and when it was done, my .tax2019 file was gone.
I was, and still am, extraordinarily pissed, as I have to pay penalties because Intuit is supremely bad at producing quality software. From not being able to import any info from QBO into Turbo Tax, to now TT deleting my return during an update, I can’t tell you how much I hate using Intuit software, and this might just finally be enough to push me to endure the pain of switching everything to another company that isn't completely incompetent at what is ostensibly its core competency.
