This paper provides a comprehensive review of tax research, focusing on four main areas: the informational role of income tax expense in financial accounting, corporate tax avoidance, corporate decision-making including investment, capital structure, and organizational form, and the impact of taxes on asset pricing. The authors summarize the current state of research in each area, highlighting key findings and areas for future investigation. They emphasize the interdisciplinary nature of tax research, noting the differences in perspectives and methodologies across accounting, economics, and finance. The paper also discusses the challenges and opportunities in integrating these disciplines to advance tax research. Specific topics covered include the information content of tax expense disclosures, the theoretical and empirical models of corporate tax avoidance, the trade-offs between tax and financial reporting incentives in real corporate decisions, and the effects of investor-level taxes on asset prices. The authors conclude by identifying several open areas for future research, such as the impact of tax loss carryforwards, the taxation of financial securities and institutions, and the implications of international tax issues.This paper provides a comprehensive review of tax research, focusing on four main areas: the informational role of income tax expense in financial accounting, corporate tax avoidance, corporate decision-making including investment, capital structure, and organizational form, and the impact of taxes on asset pricing. The authors summarize the current state of research in each area, highlighting key findings and areas for future investigation. They emphasize the interdisciplinary nature of tax research, noting the differences in perspectives and methodologies across accounting, economics, and finance. The paper also discusses the challenges and opportunities in integrating these disciplines to advance tax research. Specific topics covered include the information content of tax expense disclosures, the theoretical and empirical models of corporate tax avoidance, the trade-offs between tax and financial reporting incentives in real corporate decisions, and the effects of investor-level taxes on asset prices. The authors conclude by identifying several open areas for future research, such as the impact of tax loss carryforwards, the taxation of financial securities and institutions, and the implications of international tax issues.