Personal Finance ITR filing deadline ends tomorrow; here's what happens if you miss it Updated : December 30, 2020 06:26 PM IST The deadline to file an income tax return (ITR) for income earned in the financial year 2019-20 will end tomorrow i.e. December 31, 2020. ITR filing, as Income Tax (I-T) law says, is compulsory for individuals earning a specified amount of income in a year.