I started my 2018 return a few months back and filed for an extension, but did not finish. I logged in earlier this month and found my 2018 return no longer loaded. Now a new 2019 return loads. I was using TurboTax online edition, I believe the one for home and business.
I found the topic below and can't get it to work. I did not start with the free edition so I don't know how to start over and Download the .tax file.
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/270...
