The Sefin App was developed by the Rondônia State Finance Department - SEFIN/RO with the aim of integrating and facilitating access to essential services offered by this Secretariat. Through a centralized and secure platform, the application aims to provide greater convenience, efficiency and agility to taxpayers in managing their tax obligations, offering services such as issuing and authenticating negative certificates, generating state revenue collection documents, and also facilities for printing taxes on motor vehicle property in the state of Rondônia.