Aren't tax deductions just like not having (making) the money in the first place?
For instance, the interest I pay on my home mortgage (say 8k per year) comes right off the top of my income for tax purposes. It's like I never made that 8k. I'm not taxed on it, so it's just not there.
So if I had this wonderful dilemma of winning 30k a year at poker (as if), but I could show that as really 60k in winnings but 30k in losses, and those losses are deductions just like mortgage interest, well, then I really can count the 30k as a "net" (and give the government somewhere between $7,500 and $10k, just for being honest).
If I ever manage to get to the point where I have a bankroll worthy of withdrawing something with a comma in it, I'll certainly talk to a tax attourney or accountant, just to be sure.
Just don't mess with the government when you might owe them money. They get really cranky about that.
