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Product Number Title Revision Date
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
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 2019
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 2011
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 2007
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 2004
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1998
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1995
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1993
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1990
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1987
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1985
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1982
Form 6497 Information Return of Nontaxable Energy Grants or Subsidized Energy Financing 1981
Form 6627 Environmental Taxes 2024
Form 6627 Environmental Taxes 2023
Form 6627 Environmental Taxes 2022
Form 6627 Environmental Taxes 2021
Form 6627 Environmental Taxes 2020
Form 6627 Environmental Taxes 2019
Form 6627 Environmental Taxes 2018
Form 6627 Environmental Taxes 2017