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??
If these coins are not legalized in our country then I think it is not important that we pay taxes in the profit from these coins. If the governments will want a tax in that profit then it is important for them that they legalize these cryptocurrencies in their country and have to allow their banks to adopt and start to use these cryptocurrencies then it will be obligated on us to pay taxes.