Internal control systems cannot be underestimated as it serves as the lifeblood of most institutions in terms of its imperative roles that it plays in both tangible and intangible assets of an organization. Internal control actions on quality financial report state positive goals more especially when all parties involved adhere to their duties; thus, making the quality of financial reporting comparable, understandable, relevant, and reliable. In this regard, this study investigated the impact of government internal control systems on financial reporting quality in Ghana using Ghana Revenue Authority as the case study. Specifically, the study examined the nature and quality of financial reporting and the impact of government internal control systems on financial reporting quality. Both quota and simple random sampling techniques were used to select fifty (50) persons as the sample size of the study. Questionnaires were used to obtain data. The correlation matrix was used to examine the relationship between government internal control systems and financial reporting quality. The study finds out that contrary to apriori expectation sign monitoring as an element of internal control system has a negative impact on the financial quality reporting but was however statistically significant. The study also revealed that with a unit increase in the collection performance, the financial reporting quality of GRA will improve. The study recommended that the government should ensure that the internal control systems are well monitored and regulated.