This my first year trading, and I'm up about 350%.... ( I love biopharms ). My question is regard to US taxes that I will have to pay as a US citizen. I realize that of my sold stocks I will have to pay about 30%. Here is my question- What can I use as deductions against these profits?- Laptop purchase? BioMed subscriptions? blackberry data plans? Dish Network Costs? Home Office Space, etc.? Thanks for your help.