This study aimed to assesses the effectiveness of tax administration in Kolfe Keranio sub city administration revenue office. The target population of the study included tax payers and employees of the office with 150 tax payers and 75 employees. In order to address the research questions, qualitative and quantitative research approaches were employed. The researcher used both primary and secondary sources of data. In order to get primary information, questionnaire and interview were employed. | Assessment on effectiveness of tax administration in ethiopia the case kolfe keranio sub city administration revenue office