First I utilize a download version for Windows on my computer. I just finished however my feeling is be sure to save your file before anything. Have you tried the back button to see if you were proceeding correctly? Are you on the correct tab? You have option to reach out to turbo tax help on the website. Also if you exit the program, of course after saving, then re-enter there is the option to file for extension right on the front page of the program.
Hope it helps.
