You can use Free File to file for an extension. Many private-sector companies in the IRS Free File Alliance offer extensions for no charge. You can access Free File via the IRS Web site at IRS.gov. Taxpayers with adjusted gross incomes of $54,000 or less may file their 2007 Federal Income Tax Returns electronically through Free File.
If you ask for an extension via computer, you can also choose to pay any expected balance due by authorizing an electronic funds withdrawal from a checking or savings account. You will need the appropriate bank routing and account numbers and must also have available the adjusted gross income from your 2006 federal income tax return to verify your identity. For information on these and other methods of payment, visit the IRS.gov Web site or call 800-TAX-1040 (800-829-1040).
If your return is completed but you are unable to pay the full amount of tax due, do not request an extension. File your return on time and pay as much as you can. The IRS will send you a bill or notice for the balance due. To apply online for a payment agreement, go to IRS.gov, use the pull-down menu under “I need to …” and select “Set Up a Payment Plan.”
To obtain a copy of Form 4868 or other forms and publications use E-file tax preparation software, download them from IRS.gov or visit your local IRS office. Note that forms and publications can be ordered by calling 800-TAX-Form (800-829-3676). However, telephone requests normally take 10 days to fill and may not arrive before the tax deadline of April 15.
Remember that for the genuine IRS Web site be sure to use .gov. Don't be confused by internet sites that end in .com, .net, .org or other designations instead of .gov. The address of the official IRS governmental Web site is www.irs.gov.