The e-filing of income tax returns is compulsory for all income-earning individuals in India. To file your taxes online, you will have to submit your income tax returns on the portal. Electronic filing, or e-filing of returns, as it is also called, is basically the submission of an individual's income tax returns online. Most people who have an income are required to file income tax return aka ITR. Filing income tax returns in India is a fairly simple process for many people. You can file ITR online for free The last date to file your income tax returns (ITRs) is July 31. All Indians, including NRIs, with a gross total income of over Rs 2.5 lakh have to mandatorily file returns.