don't know why pperhaps call broker but 1256 contracts do not get entered on 1099-b/8949 they get entered on form 6781
here's alink to the form
https://www.irs.gov/pub/irs-pdf/f6781.pdf
and here's a link to pub 550
https://www.irs.gov/pub/irs-pdf/p550.pdf
