Form W-9 (Rev. October 2018) IRS This document provides information needed to correctly identify the taxpayer (1. The taxpayer's name); and 2. verify the taxpayer's tax filing status and income. Form W-9 (Rev. October 2018) IRS This document allows the IRS to determine the amount of tax that should be withheld from the payer(s) for submitting W-9 information to their federal employers. Form W-9 (Rev. October 2018) IRS This document is used by the U.S. Treasury Department to collect information on Form W-9 and determine whether the user has met the reporting threshold requirements. This document is intended to answer the question that was first discussed with the IRS: Did Form W-9 provide correct information to the IRS? Form W-9-R. Income Tax Return (Form 1040) Form W-9 and W-7, Employer' (Form 1040EZ) Form W-8A, Employer's Withholding Allowance (Form 1040EZ) Form W-8B, Employer's Withholding Tax (Form 1040F) Form W-8G, Employer's Withholding Tax on Overpayments (Form 1040G), for Employees Form W-8K, Employer's Withholding Tax on Underpayments (Form 1040K), for Employers for Subtotal amounts over 3,500 Form W-8L, Employer's Withholding Tax on Underpayments for Overpayments over 3,500, for Employees Form W-8P, Employer's Withholding Tax on Payee Underpayments (Form 1040P), for Individuals Form W-9-R, Income Tax Return (Form 1040) Form 1041, W-7B, U.S. Tax Return Form 1041S, W-7B-B, Supplemental Tax Return Form 1041A, U.S.