The research in this Final Project Report aims to examine the reporting mechanism for Annual Personal Income Tax (PPh) Notification Letters (SPT) for employees at PT PLN (Persero) UP3 Jambi using the Coretax application. This study employed a qualitative descriptive method through data collection techniques such as observation, interviews, and documentation. The results indicate that Coretax implementation can improve the effectiveness and simplify the Annual SPT reporting process. However, several obstacles were encountered, such as user adjustment to the new system and server stability issues. Overall, the Annual SPT reporting mechanism has been implemented in accordance with applicable tax regulations.
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