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AB 870·WI·house

Relating to: adopting changes to the federal Internal Revenue Code for state tax purposes and modifying administrative rules related to such changes. (FE)

Passed One ChamberFiled Jan 16, 2026
Sponsor: Wittke
Latest Action

Failed to concur in pursuant to Senate Joint Resolution 1

Jan 16, 2026

Summary

The bill revises definitions of the “Internal Revenue Code” for Wisconsin tax purposes, specifies which federal provisions are adopted or excluded, and adds rules to prevent double‑counting of income or deductions. It mainly affects individual taxpayers and fiduciaries filing state returns for years after 2022 and 2025. Aligning state law with federal updates aims to simplify tax compliance and ensure consistent treatment of income, deductions, and credits.

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