Tax Type is a term used to describe the various types of taxes that individuals and businesses are required to pay. The three most common tax types are EXCISE, SIN, and FICA. EXCISE taxes are taxes imposed on specific goods or services, such as gasoline or cigarettes. SIN stands for Social Insurance Number, which is a nine-digit number issued by the Canadian government to individuals for the purpose of administering various government programs. FICA stands for Federal Insurance Contributions Act, which is a payroll tax imposed on both employers and employees in the United States.