I talked to one CPA and I don't want to use him as even though he sounded very smart and nice but he has never handled Traders Tax return or even K1 from public traded company.
Traders Tax return is NOT much different than any individual who trades under his/her name. In case of S corp there is additional W2 and 1099s from S corp. Tax return Lay out is different as there is Sch C. I am not trying to under estimate work or services of CPA. That's why I kept on using work right CPA.
Many CPA assume Securities Trading is like any other business with employees, pay roll issues, compliance issues, clients and money moving in and out. CASH payment which IRS hates. Trading business (in a single member LLC) is easy compliance as IRS itself can count each and every penny from Brokerage without any help from me. These day all trading is electronics.
