The Taxpayer Certainty and Disaster Tax Relief Act of 2019, enacted on December 20, 2019, as part of the Further Consolidated Appropriations Act of 2020, retroactively extended a number of fuel tax credits, including the: biodiesel and renewable diesel credits biodiesel and renewable diesel mixture credits, alternative fuel credit, alternative fuel mixture credit, and second-generation biofuel producer credit. Each of these credits had previously expired on December 31, 2017. See Notice 2020-08 PDF for more information on how to claim these credits for 2018 and 2019. Related Topics Excise Tax