It's a good year for those who leave their taxes to the last minute. You're getting a two-day reprieve.Everyone's default assumption is that April 15 is the filing deadline, but the actual deadline this year is Tuesday, April 17.Here's why: April 15 falls on a weekend. When that happens, the official filing deadline takes place the Monday following.But Monday, April 16, is Emancipation Day, a legal holiday in the District of Columbia. It marks the day that President Abraham Lincoln signed the Compensated Emancipation Act in 1862, which freed over 3,000 slaves in D.C.Despite the holiday, the IRS will be open if you have questions, or if you're in the mood to file your return a day early.If you need more time to pull your return together and can't make the April 17 deadline, file for an automatic six-month extension to avoid a late penalty. That way, you'll push your filing deadline to Monday, Oct. 15.When you do, make sure that you've already paid the IRS at least 90 percent of the taxes you owed for last year. Otherwise, you could face a late payment penalty.