This final report was prepared based on the results of an internship program conducted at the Tax Service Office (KPP) Pratama Ilir Barat I Palembang, focusing on the procedure for issuing Tax Collection Letters (Surat Tagihan Pajak/STP) to taxpayers. The purpose of this report is to describe the procedures for issuing STP, identify the implementation of the Coretax system in the issuance proce…