Before everyone get on my case, no one is going to know if you pay professional fees or not, if you trade under an LLC. You can sign up for fees under you own name and write them off against the LLC just the same. As long as you are a managing member it shouldn't be a problem. Trading under an LLC you get many more write offs, it would take me too long to make a list, sorry. Plus if you have a losing year you can write the whole amount off against any other income you may have as opposed to having the 3k limit per year as a personal investor. I used daytradertax.com, Paul is good and reasonable priced. I used him.Tradersaccounting.com is good, but the want to sell you the cadiallac when most new business need a Toyota Corolla.
Dan