Due date of filing income tax return for FY 2017-18 (AY 2018-19) was 31st August 2018 for Individuals 30th September 2018 for Businesses (requiring audit) (This is income tax return for the financial year 2017-18. Applicable for income earned from April 1st, 2017 to March 31st, 2018). Not sure whether you should file an income tax return? Read our article. You can use ClearTax to e-File your IT Return right away.
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Important Due Dates of Income tax return filing for the year 2018 Whenever we talk about income tax, there are various kind of compulsory tax formalities that need to be followed by a person and that too within the specified due dates prescribed, such as filing of income tax returns, paying advance tax on time. Here is the TAX CALENDARfor2018.This has important Tax Due and income tax return filing dates for the year 2018. TAX CALENDAR 2018
15th March, 2018(a) Fourth installment of Advance Tax due for the FY 2017-18(b) Due date for the whole amount of Advance Tax for FY 2017-18 for taxpayers covered under presumptive scheme of Section  44AD and 44ADA Read about how to calculate and pay Advance Tax. 15th June, 2018Due date for the First installment of Advance Tax for the FY 2018-19 was 31st August, 2018. Due date for filing Income tax return for FY 2017-18 for all persons except :(a) Companies (b) Non-Companies whose books are required to be audited (c) Working partner of a firm whose accounts are required to be audited 15th Sep , 2018Due date for the Second installment of Advance Tax for the FY 2018-1930th Sep, 2018Due date for filing of  Audit report/Income tax return for the FY 2017-18 for the following:(a)companies (b)Non-Companies Whose books are required to be audited 30th Nov, 2018
  1. Due date for filing Audit report for the FY 2017-18 in case of a person who is required to submit a report pertaining to international or specified domestic transactions under section 92E
  2. Due date for report to be furnished in Form 3CEB in respect of international and specified domestic transactions
  3. Due date for filing of Income tax Return for FY 2017-18 for the aforesaid taxpayers
  15th Dec, 2018Due date for the third installment of Advance Tax for the FY 2018-19
Further, here, it would be relevant to mention that if the due date for filing the original return of income is missed, on can file a return belatedly called a belated return for the FY 2017-18 on or before 31 March 2019.
– If you have missed the due date to file your return, you can still file it before 31 Dec 2018 by paying a fee of Rs 5,000. If you are filing after 31 December 2018, you will have to pay a fee of Rs 10,000. Also to note that the time limit for filing a return late for FY 2017-18 expires on 31 March 2019.