The tax situation is far from straightforward really. Deductions, accountants, what´s ok and what´s not ok? Add to the mix different countries with slight differences in legislation depending on the country.
A bit like making Mojito´s at a party, once you get the ingredients in the mixer and start the process and as people hear the noise they gather around you saying things like ohh that looks nice and i would love one. But it is a very difficult drink to make as it can very easily be to sweet, to sour, to salty, not enough booze, too much booze. All depends on the crowd in the end.