After you get the program installed the first thing to do before you open your tax return is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to File-New Tax Return).
Then go to FILE -Open and find your return.
But you may not be able to update 2018 or download the state program now. You might need to get a copy from the IRS. OR you could try the TaxPrinter service to convert a .tax file to pdf at
http://www.taxprinter.com
They might be expensive and it is probably not safe to email tax returns back and forth. They are not related to Turbo Tax.
