The legitimate IRS Form W8BEN, does not ask for your PIN numbers, passcodes, date of birth, passport number or mother's maiden name. Learn how to tell the difference between a debt collection scam letter and legitimate letters you might receive from the Tax Department or collection agency.7. Contention: The Sixteenth Amendment does not authorize a direct non-apportioned federal income tax on United States citizens. The attached application MUST be typewritten and signed. This item provides an overview of the types of income subject to U.S. withholding tax and related U.S. information reporting requirements. Federal income tax withholding unless you elect not to have withholding apply. If your boss did not withhold enough, then it is YOUR fault. It is not the fault of your boss. Federal income tax withholding unless you elect not to have withholding apply. â–« serve in the U.S. military (if needed).