In Nigeria, the Finance Act has been reviewed annually since 2019. This study looked into how taxpayers felt about the fairness of taxes and how well-informed they were about taxes in response to this yearly review of the Finance Act of 2019–2023. The objective of the study was to ascertain how taxpayers' perceptions of the fairness of the tax laws outlined in the Finance Act of 2019–2023 differ depending on their level of tax knowledge. The study used survey methodologies to collect data from taxpayers. The information was gathered using a questionnaire. From FIRS offices in the states of Kano, River, and Lagos, information was gathered. The data were analysed using a structural equation model to see if there is a significant relationship between tax knowledge and a perception of tax fairness. According to the findings, taxpayers do not think that the Finance Act of 2019–2023 is fair or that it has enhanced their understanding of taxes. The study recommends, among other things, that the Nigerian government grant access to basic infrastructure because doing so displays the proper use of tax resources.