

Why is it always like this…
Not everything and everyone is in the US.
I also prefer Windows to Linux in the desktop environment. As for my server tasks, I mostly prefer Debian and if needed I’ll use Windows Server (obviously unlicensed/not activated).
I’ll use what fits for the task. :)
Edit: Also not a bad thing to separate a machine that holds sensitive data (even if they are encrypted) from another with a higher risk rating. Even if it’s Linux, Mac OS, Unix or whatever based.
No worries.
As for your questions:
In Germany we can optionally file taxes. If we were overtaxed, we can claim the overcharged amount back.
As for why not on my main PC: I don’t want that kind of software clogging up my main rig. Also helps keeping my digital mess a bit more organized ;)