You use the "Stocks, Mutual Funds, Bonds, Other" interview, presumably telling TurboTax you didn't get a 1099-B. You'll be dropped into a guided interview where you'll tell TurboTax the details of the sale ($0 proceeds) and the details of your purchases. On the page "Do Any Special Situations Apply to This Sale?" you'll select "Small Business Stock" then continue the interview.
