Versions of 26 CFR 1.507-4 - Imposition of tax on LawServer 2024 26 CFR 1.507-4 – Imposition of tax 2023 26 CFR 1.507-4 – Imposition of tax 2022 26 CFR 1.507-4 – Imposition of tax 2021 26 CFR 1.507-4 – Imposition of tax 2015 26 CFR 1.507-4 – Imposition of tax 2014 26 CFR 1.507-4 – Imposition of tax 2010 26 CFR 1.507-4 – Imposition of tax 2009 26 CFR 1.507-4 – Imposition of tax