Plus Deutsch is German for German, henceforth the explaination on why the Pennsylvania Dutch are called that when they are really German and not Dutch. The Dutch from the Netherlands also got their ethnic name derived from the German term Deutsch as well believe it or not. If you're Dutch, then you are from Denmark.
1 Deadline for filing a 2015 personal, partnership, or calendar year estates/trusts tax returns or extension.  The return or extension must be postmarked or transmitted for e-filing by Monday, April 18, 2016 (April 19 for Maine and Massachusetts residents).
Important: The deadline to efile a 2016 tax return, with or without an extension, is October 16. Start your return below: Start Your 2016 Tax Return Now! Now that you have filed or efiled a tax extension, you have met your filing requirements (until October 16), but NOT your payment obligations if you owe taxes. If you did not file a tax return or extension by April 18, you have until October 16, 2017 to efile your 2016 Tax Return. What if your tax extension was rejected? If the IRS did not accept your extension, you should efile your tax return as soon as possible.