Tax administration digitalization in Indonesia is entering a new phase with the introduction of Coretax DJP. This system integrates various tax administration processes into a single platform, from registration and tax return filing to payments, audits, and collection. Starting in 2026, Coretax will become an important part of taxpayers’ tax-related activities. Therefore, understanding how the system works and who can use it is no longer just additional knowledge. Coretax is