Drew Angerer/Getty Images Americans were given an extra three months to file and pay income taxes this year when the deadline was moved to July 15. Filing taxes can be time consuming. If you prefer to set aside time on a weekend, you only have two chances left. If you don't file your tax return on time and owe money, the IRS will charge you a penalty and ongoing interest. People who are expecting refunds will earn interest from the IRS if they file by the deadline. TaxAct is currently offering 35% off on Federal and State returns » You may have put off filing your taxes for a few months after the Treasury Department extended the deadline earlier this year, but the window of government-sanctioned procrastination is closing.