In Austria, the Tax Identification Number (TIN) is known as the "Steuernummer" or "Steuernummer für Körperschaften" for legal entities. For individuals, it is usually referred to as "Sozialversicherungsnummer" or "Versicherungsnummer." Here are the general steps to obtain a TIN in Austria. For Individuals: The TIN is assigned automatically when you register with the social insurance system. When you start working, your employer will take care of your social insurance registration, and you will be assigned a TIN. For Legal Entities: Legal entities need to register with the tax authorities. This is usually done through the district tax office ("Finanzamt") responsible for the location of the company.