Hidayah, N., Sukirno, S., Hutama, P.S.P. and Sayekti, F.N. 2026. Peningkatan Kompetensi Pajak dengan Pelatihan Perhitungan PPh 21 Berbasis Tarif Efektif Rata-rata pada Guru Akuntansi SMK di Kota Yogyakarta: Enhancing Tax Competence through Income Tax Article 21 Calculation Training Based on the Average Effective Rate for Vocational High School Accounting Teachers in Yogyakarta City. PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat. 11, Suppl-1 (Jan. 2026). DOI:https://doi.org/10.33084/pengabdianmu.v11iSuppl-1.10871.