Find IRS forms, instructions, publications, and notices for prior years back to 1864.

If a PDF file won't open, try downloading the file to your device and opening it using Adobe Acrobat. 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.

  1. Enter a term in the Find box
  2. Click the Search button
Find Help
Product Number Title Revision Date
Instruction CT-1 Instructions for Form CT-1, Employer's Annual Railroad Retirement Tax Return 2012
Instruction CT-1 Instructions for Form CT-1, Employer's Annual Railroad Retirement Tax Return 2011
Instruction CT-1 Instructions for Form CT-1, Employer's Annual Railroad Retirement Tax Return 2010
Instruction CT-1 Instructions for Form CT-1, Employer's Annual Railroad Retirement Tax Return 2009
Instruction CT-1 Instructions for Form CT-1, Employer's Annual Railroad Retirement Tax Return 2008
Instruction CT-1 Instructions 2007
Instruction CT-1 Instructions 2006
Instruction CT-1 Instructions 2005
Instruction CT-1 Instructions 2004
Instruction CT-1 Instructions 2003
Instruction CT-1 Instructions 2002
Instruction CT-1 Instructions 2001
Instruction CT-1 Instructions 2000
Instruction CT-1 Instructions 1999
Instruction CT-1 Instructions 1998
Instruction CT-1 Instructions 1997
Instruction CT-1 Instructions 1996
Instruction CT-1 Instructions 1995
Instruction CT-1 Instructions 1994
Instruction CT-1 Instructions 1993
Instruction CT-1 Instructions 1992
Instruction CT-1 Instructions 1991
Instruction CT-1 Instructions 1990
Form CT-1X Adjusted Employer's Annual Railroad Retirement Tax Return or Claim for Refund 2024
Form CT-1X Adjusted Employer's Annual Railroad Retirement Tax Return or Claim for Refund 2023
Get Adobe Acrobat Reader