Panjaitan, Muhammad Adriansyah Safii, surya sanjaya, and Muhammad irsan. 2024. “INCOME TAX (PPH) 21 CALCULATION APPLICATION”. International Journal of Economic, Technology and Social Sciences (Injects) 5 (2): 124 – 132. https://www.jurnal.ceredindonesia.or.id/index.php/injects/article/view/1186.