Hey, in case @TaxesPayTeachersPlusOtherThings or someone else will stumble on the same thing, like I did...
I just went off the call with Turbotax expert and they said that this particular screen applies only in case if you have some straddle trades that were carried over end of the year, which would imply some proceeds at fair market value on the last business day of the year. You'd likely see something in fields 8 to 11 of your 1099-B in such case.
In my case, all my straddle positions were opened and closed during same tax year, and were reported by my broker in form 1099-B along with all other option trades. Fields 8-11 of 1099-B all are empty.
So the Turbotax expert suggested that I do not fill out this confusing screen. Basically, I just responded "No" to the Turbotax question regarding Section 1256 and straddle trades, which has removed the entire section from my Wages & Income area.
I hope this helps.
