In that section, after going through the wizard about buying/selling in the same year, it says "Since you sold this ISO stock in the same year you bought it, you don't need to report anything here. Make sure to report the ISO stock sale as an Investment Sale."
There is no way to enter a 3921 here...
The "Stocks, Bonds, Mutual Funds" section says that it "Covers 1099-B, 3922, 3921," but when you continue it only gives you a chance to enter information from a 1099-B.
