This document provides an overview of income tax administration in India. It discusses key concepts such as the definition of income, person, assessee, permanent account number, assessment year, previous year, and total income. It describes the broad mechanism of income tax, including the roles of the Central Board of Direct Taxes, Finance Act, and Income Tax Act. Various heads of income are also outlined. In summary, the document introduces some fundamental concepts and principles that underlie the Indian income tax system.