Tax Certeza is a Windows desktop application for accountants and accounting firms in Mexico that handles the monthly fiscal close. It downloads CFDIs from the SAT, classifies them, reconciles them against bank statements, and calculates IVA and ISR, including DIOT preparation. The results are ready to import into CONTPAQi, so firms keep their existing accounting system. All data stays on the user's computer (100% local), and the software is kept up to date with SAT rule changes. Spanish and English interface.
