The difference in gender factor influences the knowledge and understanding about the personal
income tax. Female has higher knowledge and understanding about the personal income tax than the male at the statistical significance of 0.05 levels. The different education levels influences the knowledge and understanding about the personal income tax. The people who have high school level and bachelor degree gain better knowledge and understanding about the personal income tax than people who have below junior high school level and higher bachelor degree at the statistical significance of 0.05 levels.The difference in career factor influences the knowledge and understanding about the personal income tax. The company employee has more knowledge and understanding about the personal income tax than the other careers such as business owner, private employee, merchant and government officer or state enterprise officer at the statistical significance of 0.05 levels.