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 - 3 of 3Find Help Find Prior Year » RegExReplace » Product Number Prior Year » Revision Date Prior Year » Title Show per page 2550100200 SearchClear Product Number Title Revision Date Form 8879-EMP IRS e-file Signature Authorization for Forms 940, 940 (PR), 941, 941 (PR), 941-SS, 943, 943 (PR), 944, and 945 2013 Form 8879-EMP IRS e-file Signature Authorization for Forms 940, 940 (PR), 941, 941 (PR), 941-SS, 943, 943 (PR), 944, and 945 2017 Form 8879-EMP IRS e-file Signature Authorization for Forms 940, 940 (PR), 941, 941 (PR), 941-SS, 943, 943 (PR), 944, and 945 2023