2018 E-File Dates
January 29 – First day to e-file and first IRS acknowledgements of e-filed returns
April 17 – Last day to e-file timely returns and extension requests
April 24 – Last day to retransmit rejected timely filed returns and extensions
June 15 – Last day to e-file timely extension request for overseas taxpayers
October 15 – Last day to e-file returns that received 6-month extension
October 22 – Last day to re- transmit rejected late or extension returns
Important
Tax Dates
April 17 – First 2018 estimated tax payment due
June 15 – Second 2018 estimated tax payment due
September 17 – Third 2018 estimated tax payment due