Filing for a Tax Extension Takes Less Than 10 Minutes. Here's How To Do It for 2019 by Alix Langone As the saying goes, there are only two things in life that are certain: Death and taxes. So if you know you have to file your taxes, you probably know they’re due April 15th. But there are exceptions to every rule — even when it come to Uncle Sam. If you can’t file your taxes by Monday, you can receive a six month extension from the government.