To properly report your business expenses, gains, and losses as a trader it’s highly recommended you use a CD or downloadable version of TurboTax because some entries will need to be entered directly in Forms Mode.
If you have not made a Section 475(f) Market-to-Market (MTM) election, then your trades are reported on Schedule D and Form 8949, if you have elected MTM, then your trades are reported on Form 4797.