Normalize a German tax number (Steuernummer) to the national format
$ npm install normalize-steuernummer
const normalizeSteuernummer = require('normalize-steuernummer')
normalizeSteuernummer('21/815/08150', 'DE-BE')
// => "1121081508150"
normalizeSteuernummer('75 815 08152', 'DE-HB')
// => "2475081508152"
Type: string
German tax number (Steuernummer).
Type: string
State (Bundesland) as ISO 3166-2 code.