The latest versions of IRS forms, instructions, and publications. 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 - 2 of 2Find Help Find Show per page 2550100200 SearchClear Product Number Title Revision Date Posted Date Form 6478 Biofuel Producer Credit Jan 2020 01/14/2020 Instruction 6478 Instructions for Form 6478, Biofuel Producer Credit Oct 2023 10/26/2023
