Purba, V.A.N.S. and Nasution, M.I. 2025. The Impact of Increasing Regional Taxes and Regional Levies on the Original Regional Income (PAD) of Simalungun Regency. Holistic Science. 5, 2 (Aug. 2025), 231–237. DOI:https://doi.org/10.56495/hs.v5i2.1272.