Any Individual or group of Individual or artificial bodies who/which have earned income during the previous years are required to pay Income tax on it. The IT Act recognizes the earners of income under seven  categories. Each category is called a Status . These are Individuals, Hindu Undivided Family [HUF], Association of Persons [AOP], Body of individuals [BOI], Firms, Companies, Local authority, Artificial juridical person.
When Companies pay taxes under the Income tax Act it is called Corporate tax .