Versions of Iowa Code 421.63 - Authority to enjoin certain tax return preparers on LawServer 2024 Iowa Code 421.63 – Authority to enjoin certain tax return preparers 2023 Iowa Code 421.63 – Authority to enjoin certain tax return preparers 2022 Iowa Code 421.63 – Authority to enjoin certain tax return preparers 2020 Iowa Code 421.63 – Authority to enjoin certain tax return preparers