W-9 Forms (PDF) — The IRS may also need to use substitute W-9 form for you if you have a different TIN or state. General info. And substituting the substitute W-9 form (PDF) — SUBSTITUTIONS for the substitute W-9 Form are available for all U.S. states and for U.S. territories. Form W-9, General Information for Requesting Taxpayer Identification — IRS Instructions for the Substitute Form For the Substitute Form: Fill out the general information and follow the Substitute Form to submit Form W-9 to the IRS.