According to an update to the Norwegian tax authority's COVID-19 webpage, the tax return for self-employed persons and businesses for 2020 is due by the standard 31 May 2021 deadline, but applications will be accepted for extending the deadline to 20 August 2021. A similar extension was provided in 2020 for the 2019 return but was provided automatically.
Businesses that are granted a deferred deadline to submit the tax return, and that submit after the 20 August 2021 deadline, will be charg…