Section 1256 summary (SPX option): It is in form 1099B, but how can I enter summary data from there?
Index option (SPX option) should be section 1256, and use IRS form 6781.
I don't remember how I entered Section 1256 data in Turbo desktop software before, but I am using TurboTax website now. I have not decided if I will use Turbo yet, just using its website to see the result first.