Carryforward Losses trading options on futures

Hi,

 

I did my taxes with a CPA not TT for 2017. Now it's time to file 2018 tax and I have question about losses from trading Options on Futures: can I carry forward losses from 2017. My accountant says I can't. I wonder why? They filled my tax return using Form 6781: Gains and Losses From Section 1256 Contracts and Straddles. I am not an accountant, but trying to understand how to properly enter information in 2018. Can  you please advise? I want to amend my tax return.

 

thank you in advance for your help!