2024 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2023 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2022 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2021 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2020 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2018 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2017 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2015 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2014 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2013 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2012 26 USC 643 – Definitions applicable to subparts A, B, C, and D

2010 26 USC 643 – Definitions applicable to subparts A, B, C, and D