The Norwegian tax year runs from January to December. Annual taxes are filed electronically on or before April 30th. In Norway, the tax system is divided into several brackets.
When calculating your tax rate, make sure to factor in income tax (22%), National Insurance (calculated on personal income), and your bracket tax (calculated on personal income). Norway also has a wealth tax, which is paid on cars, property, shares, bank deposits, etc.
In March/April you will receive notice that your tax return is available for review ("Skattemelding"). You can log in with MinID and see any adjustments. Note: if there is nothing to amend then submit it. If there are changes needed, make the necessary adjustments and submit the "Skattemelding" by April 30th.
The system itself is easy to navigate, and the easiest way is to submit your self assessment online.
You can find out more about how much you will pay in taxes and how at The Norwegian Tax Administration (Skatteetaten).
Need to apply for "Skattekort"?
The best source to find out about Skattekort/tax deduction card, PAYE and is The Norwegian Tax Administration.
Public record
Your tax payments are public information. This makes Norway one of the most transparent countries in the world. Forbes wrote an article about this in 2019 (link).