If you obtained a filing extension for your personal 2023 income tax return (Form 1040 or 1040-SR) and have not yet filed, today is the deadline for getting it in; you can still e-file the return. If you fail to file by today, you will owe a late filing penalty; no additional extensions can be granted. Calendar-year C corporations on extension must file Form 1120 for 2023 by today. Special extensions for individuals and C corporations apply for those impacted by a federally-declared disaster. Find a list of disaster-related extensions from the IRS. #IdeaoftheDay