Get your taxes done using TurboTax
Enter the sale of private stock in the same place you would enter any stock sale - the Stocks, Mutual Funds Bonds and Other interview.
Enter "stock" in the search window and select "jump to stock" from the search results.
When you come to the screen "OK, what type of investments did you sell?", select "Other" (don't worry, the program will still report it correctly).
See the attached screenshots for aid in navigation:
