It's mostly situational, really. Countries all have their own frameworks for charging taxes for Bitcoin, if at all. Most of the time they'll care about taxes from Bitcoin in the form of capital gains, so it isn't a struggle if you go with those numbers and pay them their dues, depending on what the various thresholds are for the tax brackets.

There is no one-size-fits-all and it all comes down to country's laws. You have to figure out that part on your own, unless you live in a country where everyone already talks about it.