Versions of Missouri Laws 143.980 - Citation of law -- definitions -- preparer tax identification number .. on LawServer 2023 Missouri Laws 143.980 – Citation of law — definitions — preparer tax identification number .. 2022 Missouri Laws 143.980 – Citation of law — definitions — preparer tax identification number … 2020 Missouri Laws 143.980 – Citation of law — definitions — preparer tax identification number …