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Taxes are the largest contributor to state revenue in financing national development. Tax compliance is the act of the taxpayer in fulfilling their tax obligations following the provisions of the legislation and tax implementation regulations in force in a country. Efforts made by the government to improve taxpayer compliance are by reforming tax laws and the tax administration system. This study aims to determine the effect of tax knowledge, tax sanctions, the benefit of the taxpayer identification number, and modern tax administration systems on personal taxpayer reporting compliance at the tax office in North Badung. The population of this research is personal taxpayers at the North Badung Tax Office Services, which is based on the data of individual taxpayers, as many as 95,542 people. The sample in this study consisted of 76 individual taxpayers who reported compliance, selected using a non-probability sampling method with an accidental sampling technique. The data analysis technique used is multiple linear regression analysis. The results showed that the tax knowledge variable did not affect personal taxpayer compliance, while the tax sanctions variable, the benefit of the taxpayer identification number, taxpayer awareness, and the modern tax administration system had a positive effect on personal taxpayer reporting compliance. Further research can expand on this study by incorporating other variables that, in theory, influence taxpayer reporting compliance, such as tax services.

Legal uncertainty in the implementation of the carbon tax poses significant challenges to Indonesia’s investment climate, particularly in the non-renewable energy sector. This study aims to examine how the postponement of carbon tax implementation, despite the operation of carbon trading instruments, affects foreign investors’ expectations from the perspective of investment law. The research employs a normative juridical (dogmatic) approach combined with a light event study on major policy milestones between 2021 and 2023, including Presidential Regulation No. 98/2021, Ministerial Regulation of Energy and Mineral Resources No. 16/2022, OJK Regulation No. 14/2023, the launch of IDXCarbon, and the announcement of the carbon tax delay until 2025. The findings reveal varied market responses in fossil-based utility firms’ stocks and bonds, indicating the presence of an uncertainty premium. From a legal standpoint, the asymmetric configuration between delayed fiscal instruments and the ongoing non-fiscal instruments potentially undermines the principle of legal certainty under Investment Law No. 25/2007, while also raising risks related to Fair and Equitable Treatment (FET) and legitimate expectations. Nevertheless, the state’s right to regulate remains a crucial foundation for balancing investor protection with the imperative of energy transition. This study underscores the importance of policy consistency and transparency to maintain investment attractiveness and strengthen the legitimacy of Indonesia’s climate regulation.  

Taxes are responsible for providing services and development to the community because the country’s main income comes from taxes. However, the low level of taxpayer compliance is a significant challenge. This study aims to examine how the implementation of e-tax improves taxpayer compliance in Indonesia. The researcher used a descriptive qualitative approach method by analyzing various previous journal studies. The results of the study indicate that among the  many benefit provided by e-tax, there are still obstacles in the implementation of e-tax among the taxpayer. Public awareness which is still minimal is the main challenge in implementing taxes electronically. Limitations and gaps in infrastructures that affect internet connections in their implementation make it difficult to access the DJP Online Portal. Technological developments also increase vulnerability to security, the government is required to guarantee the security of taxpayer financial data. The influence of tax implementation that affects taxpayer compliance with E-Filling. Tax payment not only covers building but also law enforcement in the field  of motor vehicle taxation. Currently the E-Samsat system has begun to be implemented which provides convenience in the tax payment process. To optimize this e-tax system, there are several strategies in the form of developing and improving the e-Filling system, providing comprehensive tax services. With a structured approach, e-tax has great potential to support digital tax reform and can improve administrative efficiency and also strengthen the country’s fiscal foundation as a whole.