From Monday 18 January 2021 the Norwegian government introduced mandatory testing at the border for persons who have been to an area that necessitates quarantine upon arrival in Norway.
From Monday 21 December, everyone entering Norway, including Norwegian citizens, must register their information before entering Norway. A declaration form must be completed and handed to the border control police. You are responsible for printing and ensuring that you have the form with you at the border.
For more information, see the following links: