[kwhitefoot]

Here in Norway i don't need to download anything, the tax authority website has all the tools I need and most of it is already filled out and ready to go. All I do is check that it is all correct things (rarely), add the bits that they can't get automatically (offshore bank accounts, stocks on the new York exchange, etc.), and hit the button to say submit it.

It immediately gives me an estimate showing how much I have overpaid or underpaid.

For people with simple tax affairs, nothing offshore and not self-employed, there is nothing at all to do.