oe Individuals. IMS Is gsneraity your social security number (SSN). Howevor, tore resident alien. ado proprietor, or dicrepaniad Gnaw, too Ns Part I Instructlora on page 3. For other snide,. It Is your employer Identlicabon numbor (EIN). If you do not have a number. see How Co gal TIN on page 3. Or Note. I