How can I file an IRS income tax extension for myself and for my business (corporation)? Can I do it online?
I heard that I can get more time to do my corporate taxes... they're due tomorrow. Help!
Good answers above on what forms to file, things to remember, etc.
If you want to file both online, there's only one website I know of that does both personal and business extensions. It's called filelater.com (http://www.filelater.com).

The continuing story of Ed Brown, the New Hampshire man who asserts Americans don't have to pay income tax and can use the tax code to prove it. With enough support, Ed may get his day in court--and that's precisely what scares the IRS. Digg this up, make some noise, and let's see what one stubborn person can do!!