API descriptions
How to authenticate with ID-Porten
A developer's guide to implementation
Description of the information services available through API
XSD for VAT return (mva-melding) - XSD for submission of metadata information - encoding in XML-format
Frequently asked questions
Test and production information
Validation rules for the VAT tax return
XSD for tax return for VAT compensation (kompensasjonsmelding for merverdiavgift) - XSD for submission of metadata information - encoding in XML-format
XSD for VAT return for reverse tax liability (mva-melding for omvendt avgiftsplikt) - XSD for submission of metadata information - encoding in XML-format
Validation rules for the VAT return for reverse tax liability