Versions of Iowa Code 450.7 - Lien of tax on LawServer 2024 Iowa Code 450.7 – Lien of tax 2023 Iowa Code 450.7 – Lien of tax 2022 Iowa Code 450.7 – Lien of tax 2020 Iowa Code 450.7 – Lien of tax 2018 Iowa Code 450.7 – Lien of tax 2016 Iowa Code 450.7 – Lien of tax 2014 Iowa Code 450.7 – Lien of tax. 2009 Iowa Code 450.7 – Lien of tax