This study examined the relationship between tax administration practices and tax revenue performance at Kampala City Council Authority (KCCA) in Uganda. The study was guided by objectives to assess the effect of taxpayer registration systems on revenue collection, to examine the influence of tax enforcement mechanisms on compliance and revenue performance, and to determine the relationship between tax education and taxpayer compliance. A correlational and descriptive research design was employed. A sample of 180 respondents comprising KCCA tax administrators, registered taxpayers, and tax professionals was selected from a target population of 380. Questionnaires and interview guides were used for data collection. Data were analyzed using descriptive statistics, Pearson's correlation, and multiple linear regression using SPSS Version 26. Findings indicate that taxpayer registration (β=0.398, p