It is similar in Norway - though I've only watched my spouse do his.
You get an email notifying you, log into the government website to check it. If you agree, the only action necessary is to pay the bill, if there is one. Otherwise, your refund will arrive. You have the option of doing actual filing or disputing the figures, but obviously don't have to.
Edit: The tax is figured out when you start work or update for things like marriage or children. This seems to include a trip to the tax authority for a personalized tax schedule.
You get an email notifying you, log into the government website to check it. If you agree, the only action necessary is to pay the bill, if there is one. Otherwise, your refund will arrive. You have the option of doing actual filing or disputing the figures, but obviously don't have to.
Edit: The tax is figured out when you start work or update for things like marriage or children. This seems to include a trip to the tax authority for a personalized tax schedule.