2024 CFR > Title 26 > Chapter I > Subchapter A > Part 1 > ABATEMENTS, CREDITS, AND REFUNDS

2023 CFR > Title 26 > CHAPTER I > SUBCHAPTER A > PART 1 > ABATEMENTS, CREDITS, AND REFUNDS

2022 CFR > Title 26 > Chapter I > Subchapter A > Part 1 > Abatements, Credits, and Refunds – Abatements, Credits, and Refunds

2021 CFR > Title 26 > Chapter I > Subchapter A > Part 1 > ABATEMENTS, CREDITS, AND REFUNDS – ABATEMENTS, CREDITS, AND REFUNDS