Thanks. I had problems with GreenTrader, about 20-25 years ago. i don't recall all the details, but they basically messed-up my return, & I had to have it re-done with another firm.
1256 trades are simple, especially with IB, as they provide 1256 form for Irs.
The problem is with Trader Status, in my case, for stocks & stock options. That permits stock trading losses to be paired against ordinary income, such as income, salaries, etc. Stock trades then go on Schedule C, "Profit or loss from Business," rather than short/long-term capital gains.
why is that a problem for you?