@DawnC Thank you so much for the detailed answer. I found that the only way to get to the summary option is to select "Section 1256 contracts marked to market". If I just select "Losses from straddles" and "Gains from straddles", I get to a different screen to enter individual straddle details.
I am assuming that index options (like $SPX spreads) can be considered as "Section 1256 contracts marked to market". It would be very cumbersome to list each individual spread/straddle otherwise.
