Over the past two decades, Indonesia has been working to modernize its tax system through a wide range of digitalization initiatives. These efforts have aimed to deliver benefits for both Indonesian taxpayers and for government authorities administering the tax system at all levels. Through its digitalization initiatives, Indonesia’s tax system has taken great strides forward, although not all tax initiatives have been successful. Key achievements are highlighted in this report, along with key lessons from Indonesia’s tax digitalization journey that could inform other countries’ reform efforts. This paper sets out pathways forward to help realize the full potential of digitalization, with specific and practical recommendations.