Income Tax is an annual charge on a person's income during the tax year that is liable to tax under income tax law. A person may be liable to pay tax, deduct or collect tax, pay tax in advance, and pay penalties. Total income is the sum of a person's income under various heads including salary, property income, business income, capital gains, and other income. These heads of income are used to classify all income for imposing tax and computing total income. The document then provides details on the taxation of property income, business income, capital gains, and income from other sources.