I think you missed the bell. Turbo 2018 stopped functioning early October!
@12121 - I don't know what you are responding to but this thread and questions are about the CD/download desktop version and the above error message is from the CD/download version that did not stop functioning in October. Only the online versions ended in October 15.
@Mac thank you for the quick response. I did wonder about the state information so I went ahead and downloaded the state info as well and am still unable to open. I purchased TurboTax Deluxe 2018 and am tryin to open my .tax2018 file with both states downloaded that I needed and am still getting that message. I was also willing to just start over and create a new return but when I hit the new button it doesn't do anything.
This is what I get after I open turbotax 2018 for the first time. It goes through the normal update screen and then in the background (its hidden until you hover over it with the mouse). Any thoughts on how to get at least a new one started? I have $120 invested in this now and haven't gotten anywhere.
@jaykay28 - Did you download and install the 2018 software into the Applications folder?
What you are pointing to is the .tax file. You should move that file form your downloads folder to your desktop. Did you install the TurboTax 2018.app in the Applications Folder, then open that and start a blank 2018 tax return and add a state in order to install the state software? Of more than one state then that must be repeated for each state. Only after you can create a new blank 2018 tax return and the states are there will you be able to open your xxx.tax2018 data file if it contains state information.
Here is the TurboTax FAQ for completing a 2018 return started online.
TurboTax online and e-file for 2018 ended on Oct 15, 2019. 2018 (and earlier tax years) can now only be completed using the CD/download software installed on a Mac or Windows computer. The return must be printed, signed and mailed.
On my iMac when I downloaded TurboTax2019 a +.dmg file" appeared in my "downloads" file. I double-clicked it and it gave me a pictorial file where I gently moved the resultant Turbo program from the box on the left to the box on the right which said "Applications." Then I discarded that file and looked in my true Applications folder and therein appeared TurboTax Premier 2019.app. Upon double clicking it I got the Apple message. Had to go to System Preferences and General and then permit my system to use the TurboTax program. That's it. I've never done anything fancy like doing your taxes after they were due. Good luck doing 2018 stuff!