Yeah, that doesn't make sense and isn't right. Of course you know you need the 2018 program installed. If you do get it 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)
If you can't install the 2018 program, 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.
