This final report is titled The Implementation of the Income Tax (PPh) Article 23 System on Rental Services at PT Kilang Pertamina Internasional Refinery Unit III Plaju, which aims to examine the mechanisms of calculation, recording, and reporting of Income Tax Article 23 on rental services as implemented by PT Kilang Pertamina Internasional Refinery Unit III Plaju, in accordance with applicabl…