NAV Authenticator

The NAV Authenticator is a free official identification application developed by the National Tax and Customs Administration (NTCA) designed to enhance the security of electronic tax administration. Available for Android devices running version 7.0 or higher, this app supports two-factor authentication for users accessing the Online Invoice System, requiring both a password and a dynamic code generated by the app or a login approval notification.

Key features include QR code scanning to connect user accounts, manual entry for backup, offline code generation, managing multiple users, and a language switcher between English and German. To use the application, users must have an active internet connection and a secondary user account in the Online Invoice System. This app ensures safer access and administration of tax-related activities, simplifying secure logins for Hungarian tax clients.