I just downloaded the 2018 software (PC) and see all of the programs on my hard drive, but there was no icon/shortcut downloaded to my desktop from which to launch the program. I cannot determine from what specific file in the Deluxe 2018 folder to launch the software.
Below are also instructions to add an icon for TurboTax on your desktop.
To answer your question, to open TurboTax from the program folder:
I do not have a turbo tax.exe only a tubotax.exe.config or turbotax.exe.config.signature. Both want me to use the web service to find the correct program or to select from list of installed programs - no of which is turbo tax (of course it is installed). Going to the web is like going into a black hole - i have no idea what to look for. I cannot launch ANY prior program 2014-2018. I am not taking about not opening a particular return. The whole program will not launch. I uninstalled and reinstalled several times.
See this TurboTax support FAQ for a contact link and hours of operation -https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number