An individual sends an Income Tax Return (ITR) form to the Income Tax Department of India in order to provide information about his earnings and taxes due for the previous calendar year. The information included in an ITR must be relevant for a certain fiscal year that runs from 1 April through 31 March of the following year. Your earnings may come from a variety of sources, including your wage, business profits, the sale of your home or other assets, dividends, capital gains, and interest payments, among others. The Income-tax Department will reimburse any excess tax you paid over the course of a year.