This document provides an overview of income tax law in India. It discusses key concepts such as the history of income tax in India, heads of income (salary, house property, business, capital gains, other sources), important terms like assessee and residential status, and the incidence of tax based on residential status (resident, resident but not ordinarily resident, non-resident). The residential status of an individual depends on the number of days spent in India in the previous year or over the last few years. The incidence of tax, or who bears the tax burden, depends on the residential status of the assessee and where the income is earned and received.