About the IRS Online Request for Taxpayer Identification Use the IRS Online Request for Taxpayer Identification in your organization to: Make a request (including submitting personal information) for any of the following: A copy of a prior year's tax return for the organization; Copy of a tax return or other notice that has been received by the organization from the IRS and made available to the organization that has been accepted by the IRS for processing. A certification of the organization's status as a tax-exempt public charity as required by IRC section 501(c)(3) with the information the IRS requires to verify that your tax-exempt status is true. Instructions You should apply this form to any tax return that has been accepted by the IRS because of the information provided for that tax return. In some circumstances, the request will help the IRS verify whether the organization, for example, should be issued a Notice of Proposed Assessment. This application should be used when the organization doesn't have an individual taxpayer identification number (TIN) or has one, but it has provided some other piece of information that is useful for the validation of the organization's 501(c)(3) status. Form W-9 is available through the IRS's Internet Taxpayer Portal. IRS provides a Taxpayer Assistance Guide. The IRS recommends this online service for taxpayers with questions regarding IRS audits or the processing of their tax returns. More Information About the IRS Online Request for Taxpayer Identification and Certification. About the Online Request for Taxpayer Identification. About Tax Preparer Education Certificate.