W-9 Form

Definition

Request for Taxpayer Identification Number and Certification. A tax form which certifies an individual's tax identification number. This form must be present in a brokerage account's files to avoid backup withholding by the IRS. This form is also used by a company or a contractee in order to request a copy of an individual's Social Security or taxpayer ID number for purposes of tax reporting.
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W-4V Form W-9S Form