German Tax Number (Steuernummer) Validator
Validate the authenticity, format, and checksum of German Tax Number (Steuernummer).
About German Tax Number (Steuernummer) Validation
The Steuernummer is the administrative tax number assigned by the local Finanzamt for companies, freelancers, and taxpayers.
Format varies by state (Bundesland) with 10 to 11 digits in regional format and 13 digits in the unified ELSTER electronic format.