Declaration using TVINN TVINN is Norwegian Customs electronic system for exchanging customs declarations. The system ensures that businesses’ goods are efficiently released (cleared).
Retrospective declaration of goods Businesses shall use the form for retrospective declaration of goods in Altinn when they are to notify Norwegian Customs of goods that were not declared upon importation. They must first submit a form in Altinn, after which they will receive a reply from Norwegian Customs and an explanation on how to declare in TVINN. They must not submit declarations in TVINN without first having received a case number from Altinn.