FREE TOOLS
Tax technology tools in one place
Searchable NAV code lists, validation-message catalogues, and in-browser checkers for eVAT and NAV M2M development.
Interactive tools
eVAT XML checker
Checker
Check eVAT 2.0 XML files against the pinned NAV XSD in the browser, without uploading them to a server.
Free · Local processing
eVAT validation messages
Searchable list
All 101 messages from the eVAT M2M interface specification, filterable by severity and affected area.
101 messages
NAV M2M error codes
Searchable list
Search the NAV M2M result and error codes published in the public OpenAPI description.
81 codes
Standard tax-code catalogue
Catalogue
Browse all 232 NAV standard tax codes, with English CSV and JSON download.
232 codes · CSV · JSON
ÁNYK route chooser
Decision aid
A short decision aid for choosing a filing and transition route after ÁNYK.
Related guides
- eVAT M2M guide — Accounting records, validation, and machine approval in the eVAT flow.
- NAV M2M guide — Machine filing after ÁNYK: process, controls, and transition.
- ÁNYK phase-out — Deadlines, channels, and a transition checklist drawn from NAV sources.