The aim of this research is to analyze the influence of government policies in the field of audit and financial audit infrastructure in improving the smoothness of the supply chain and its implications for financial management compliance in regional apparatus organizations (OPD) within the Serang City Government, Banten Province, Indonesia. The sample in this study was 225 respondents consisting of 19 from Regional Apparatus Organizations (OPD) within the Serang City Government. Sampling technique using technique purposive sampling. Data collected through questionnaires was then analyzed using SEM-PLS. The results of research and data analysis show that: Government Policy in the Audit Sector directly has a positive and significant effect on the smoothness of the Supply Chain; Financial Audit Infrastructure directly has a positive and significant effect on the smooth running of the Supply Chain; Government Policy in the Audit Sector directly has a positive and significant effect on Financial Management Compliance; The government's Financial Audit Infrastructure directly has a positive and significant effect on Financial Management Compliance; The smoothness of the Supply Chain directly has a positive and significant effect on Financial Management Compliance in Regional Apparatus Organizations (OPD) within the Serang City Government, Banten Province, Indonesia. The smoothness of the Supply Chain is able to partially mediate Government Policy in the Field of Audit and Financial Audit Infrastructure on Management Compliance in Regional Apparatus Organizations (OPD) within the Serang City Government, Banten Province, Indonesia.

This research tries to analyze the explicit and implicit impact of the smooth supply chain and fairness of the tax system on corporate taxpayer compliance and its implications for state tax revenues. This research uses quantitative methods, using random sampling techniques, and obtained a sample of 100 respondents consisting of various MSMEs registered with the Ministry of Cooperatives and SMEs in 2023 who are taxpayers in South Jakarta City, DKI Jakarta Province, Indonesia. The data obtained from the surveys was utilized in Structural Equation Modelling with Partial Least Squares (SEM-PLS) for additional analysis. Research results and data analysis show that tax system equity has a direct and significant impact on corporate taxpayer compliance; tax system fairness directly has no and minimal impact on state tax revenues; and corporate taxpayer compliance directly and significantly impacts state tax revenues. A smooth supply chain has a direct and substantial impact on corporate taxpayer compliance. Furthermore, a smooth supply chain has a direct and substantial influence on state tax collections. A seamless supply chain and state tax revenues are largely mediated by corporate taxpayer compliance, which has a substantial impact on both. Furthermore, the relationship between the fairness of the tax system and state tax collections in MSMEs in South Jakarta City is totally mediated by corporate taxpayer compliance.