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??
Yes I do. I pay because I know it will benefit my country, which in turn benefits me and my family, and everyone I know..
You have made a lot of money. It is time to help others too, including your country.