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. Enter a term in the Find box Click the Search button Showing 1 - 37 of 37Find 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 6478 Biofuel Producer Credit 2020 Form 6478 Biofuel Producer Credit 2018 Form 6478 Biofuel Producer Credit 2017 Form 6478 Biofuel Producer Credit 2016 Form 6478 Biofuel Producer Credit 2015 Form 6478 Biofuel Producer Credit 2014 Form 6478 Biofuel Producer Credit 2013 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2012 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2011 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2010 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2009 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2008 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2007 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2006 Form 6478 Alcohol and Cellulosic Biofuel Fuels Credit 2005 Form 6478 Credit for Alcohol Used as Fuel 2004 Form 6478 Credit for Alcohol Used as Fuel 2003 Form 6478 Credit for Alcohol Used as Fuel 2002 Form 6478 Credit for Alcohol Used as Fuel 2001 Form 6478 Credit for Alcohol Used as Fuel 2000 Form 6478 Credit for Alcohol Used as Fuel 1999 Form 6478 Credit for Alcohol Used as Fuel 1998 Form 6478 Credit for Alcohol Used as Fuel 1997 Form 6478 Credit for Alcohol Used as Fuel 1996 Form 6478 Credit for Alcohol Used as Fuel 1995 Form 6478 Credit for Alcohol Used as Fuel 1994 Form 6478 Credit for Alcohol Used as Fuel 1993 Form 6478 Credit for Alcohol Used as Fuel 1992 Form 6478 Credit for Alcohol Used as Fuel 1991 Form 6478 Credit for Alcohol Used as Fuel 1990 Instruction 6478 Instructions for Form 6478, Biofuel Producer Credit 2023 Instruction 6478 Instructions for Form 6478, Biofuel Producer Credit 2020 Instruction 6478 Instructions for Form 6478, Biofuel Producer Credit 2018 Instruction 6478 Instructions for Form 6478, Biofuel Producer Credit 2017 Instruction 6478 Instructions for Form 6478, Biofuel Producer Credit 2016 Instruction 6478 Instructions for Form 6478, Biofuel Producer Credit 2015 Instruction 6478 Instructions for Form 6478, Credit for Alcohol Used as Fuel 2014
