If I make a profit off my principle, obviously i pay tax, but what if during the tax year my money is in stocks and I didn't sell it off before the tax year ends, how does that work? OR lets say I do get a profit but I don't pull it out of my zecco account because I intend to continue trading with the proceeds.. do I still pay tax? OR do i pay tax only when I pull money out of this zecco account?