Hi.
i didn't traded so much of my crypto for FIAT so i didn't dealt with that question yet.
however i think it's an issue need to be dealt with.
1. do you use accounting services?
2.if so, do you keep documentation of all traded or bought coins?
3. what do you do in cases of profit from ICO's
WHAT SHOULD I DO??
I never use accounting service, because in cryptocurrency there is no such thing as tax. we are not taxed at all even though we have many coins. that's the good investment in cryptocurrency.
I think that people should pay taxes ofor their fiat if they ever cash the money out from Bitcoin. The money is built by the government.