ITR-1 form can be used by individuals who have less than Rs.50 Lakhs of annual income earned by way of salary or pension and have one house property only.
ITR-2 form must be filed by individuals who are NRIs, directors of companies, shareholders of private companies, or have capital gains income, income from foreign sources, two or more house property, income of more than Rs.50 lakhs.
ITR-3 form must be filed by individuals who are professionals or persons who are operating a proprietorship business in India.
ITR-4 form can be filed by taxpayers enrolled under the presumptive taxation scheme. To be enrolled for the scheme, the taxpayer must have less than Rs.2 crores of business income or less than Rs.50 lakhs of professional income.
ITR-5 form must be filed by partnership firms, LLPs, associations and body of individuals to report their income and computation of tax.
ITR-6 form must be filed by companies registered in India.
ITR-7 form must be filed by entities claiming exemption as charitable/religions trust, political parties, scientific research insitutions and colleges or universities.