Versions of 26 USC 4121 - Imposition of tax on LawServer 2024 26 USC 4121 – Imposition of tax 2023 26 USC 4121 – Imposition of tax 2022 26 USC 4121 – Imposition of tax 2021 26 USC 4121 – Imposition of tax 2020 26 USC 4121 – Imposition of tax 2018 26 USC 4121 – Imposition of tax 2017 26 USC 4121 – Imposition of tax