How do you file taxes after April 15?

The same way that your income tax return would have been filed if the income tax return had been correctly filled in and completed before April 15.

You have until October 15 2010 for this purpose.

Go to the IRS gov web site and go to the bottom of the page under Special Interest and choose Anyone Can Free File

Use Free File to electronically prepare and file your tax return this year.

Or click the Free File logo on right side of the page under filing and payments.

You must access Free File companies through the official IRS Web site to qualify for the free service.

You can click on the below related link