Taxes are usually due by April 15th; however, the deadline has been extended because April 15, 2016 is Emancipation Day in Washington, DC. Given that April 15, 2016 is a Friday, the next business day, and the day taxes are now due, is April 18, 2016. Additionally, due to Patriots Day, Residents of Maine and Massachusetts have until April 19, 2016 to file taxes.