Any taxpayer can file an online tax extension. All you'll need is your name, address, and either your Social Security number or Employer Identification Number (EIN). It's important to remember that you are only filing for more time to file your return, not pay any taxes you may owe. To avoid late payment penalties and interest, you should also estimate how much, if anything, you'll ultimately owe in taxes and electronically pay that amount with your extension. While late payment penalities are painful, late filing penalties are even more painful so be sure to file either your tax extension or tax return by the filing deadline. Once approved by the IRS, you will receive an automatic extension of time to file. You will have an additional six months to submit your personal or business tax return.