The document provides an overview of basic concepts related to income tax in India, including definitions of key terms like tax, direct tax, indirect tax, income, assessee, capital/revenue receipts and expenditures. It explains that the Income Tax Act of 1961 governs income tax and its provisions for determining taxable income and tax liability. Income includes various sources like profits, dividends, capital gains, interest etc. Computation of taxable income involves calculating income under different heads, applying deductions and exemptions, and determining the final tax liability.