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  • 1 Alter the tax return yourself

You must alter the tax return yourself if you discover any errors or receive new or delayed information.

The deadline for submitting the tax return has passed, but you can still make changes and submit your tax return. You do this by logging into Altinn:

What happens after I have made the necessary changes?

After you have altered your tax return, it will be checked and you may receive a new tax assessment .

You cannot make changes for the 2015 income year or earlier.

The option to make changes only applies from the 2016 income year onwards.

Errors in a tax return for the 2015 income year or earlier can only be changed by submitting an appeal to the Norwegian Tax Administration.

Unsure what changes you should make?

In order to get help to find out what changes you need to make and how to do it, see our overview of topics and deductions in the tax return. You can also see all the items in the tax return.

If you are still unsure, you can always contact us.

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