The filing deadline to submit 2016 tax returns is Tuesday, April 18, 2017, rather than the traditional April 15 date. In 2017, April 15 falls on a Saturday, and this would usually move the filing deadline to the following Monday — April 17. However, Emancipation Day — a legal holiday in the District of Columbia — will be observed on that Monday, which pushes the filing deadline to Tuesday, April 18, 2017. Under the tax law, legal holidays in the District of Columbia affect the filing deadline across the nation.
If you are planning to file an extension, the deadline to file your tax return is October 17. Nonetheless, you will still need to pay any taxes due on April 18.