Find IRS forms, instructions, publications, and notices for prior years back to 1864. View more information about Using IRS Forms, Instructions, Publications and Other Item Files. Click on a column heading to sort the list by the contents of that column. Enter a term in the Find box Click the Search button Showing 1 - 8 of 8Find Help Find Prior Year » RegExReplace » Product Number Prior Year » Revision Date Prior Year » Title Show per page 2550100200 SearchClear Product Number Title Revision Date Instruction SS-4 (sp) Instructions for Form SS-4 (PR), Application for Employer Identification Number (Spanish Version) 2023 Instruction SS-4 (PR) Instructions for Form SS-4 (PR), Application for Employer Identification Number (Puerto Rico Version) 2020 Form SS-4 (PR) Application for Employer Identification Number (EIN) (Puerto Rico Version) 2020 Instruction SS-4 (PR) Instructions for Form SS-4, Application for Employer Identification Number (EIN) (Puerto Rico Version) 2017 Form SS-4 (PR) Solicitud de Numero de Identificacion Patronal (EIN) 2017 Instruction SS-4 (PR) Instructions for Form SS-4, Application for Employer Identification Number (EIN) (Puerto Rico Version) 2016 Instruction SS-4 (PR) Instrucciones para la Forma SS-4PR, Solicitud de Numero de Identificacion Patronal (EIN) 2011 Form SS-4 (PR) Solicitud de Numero de Identificacion Patronal (EIN) 2010