Lets say a decent portion of your income is earned through bitcoins, be it bitcoin trade, gambling, free lance stuff, etc. When filing for your tax returns and that kind of stuff, do we have to state how many bitcoins you have made through these methods? I know in my country, you have to let the government know how much money you make annually so they can place you in the appropriate tax bracket. If so, how would the government be able to verify that you are being truthful? I would assume the anonymity of the BTC would make this fairly difficult.