Income Tax Calendar - Businesses (FY 2010-11): India Tax Calendar ( FY 1st April 2010 to March 2011 ) Payment of Advance Tax File Your Tax Return Other Important dates 1] On or before the 15th September 2010 (First installment) 31st July 2011- For Individuals not requiring audit report 31st March 2011- The last date for making investments in tax-saving instruments 2] On or before the 15th December 2010 ( Second Installment)   30th April 2011- Issue TDS certificates and Form 16, Form 16A for FY 2010-11 3] On or before the 15th March 2011 (Final Installment ) 30th Sept. 2011 -if required to file audit report           Generic Dates         7th of every month: Payment of TDS and TCS collected during the last month (except for TDS deducted in last month of the accounting year, payment should be made within 2 months from the last date of the accounting year) 15th of every month: Deposit of provident fund contribution for the last month 20th of every month: Payment of Professional Tax deducted during the last month 21st of every month: Deposit of ESIC contribution (Employee State Insurance Corporation) for the last month 15th of month after end of Quarter: E-filing of TDS & TCS returns