Wisconsin Publishes Updated Withholding Tax Guide

Paul Ogawa
November 19, 2019

The Wisconsin Department of Revenue recently published an updated version of Publication W-166, Withholding Tax Guide. This publication contains information relating to withholding tax remittance and reporting, including registering for state tax accounts and processes for withholding tax deposits and reporting.

There are several updates to the guide in this most recent version, which include the following:

  • Due to the redesign of Federal Form W-4, Wisconsin will no longer accept this for form beginning in calendar year 2020.
    • New employees or existing employees seeking to change their withholding exemptions must use Wisconsin Form WT-4 going forward. Existing employees that do not change their exemptions are not required to file Form WT-4 unless their employer requires it.
  • Beginning with January 1, 2019, employers filing periodic withholding reports (quarterly, monthly, semi-monthly) cannot submit their annual reconciliation using WT-7 until all deposit reports on WT-6 have been filed. Error messages through electronic filing systems will notify taxpayers of their missing reports.

Please note that this publication has some information that is subject to final review after public comment. To review this publication in its entirety, please click here.

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Paul Ogawa

Paul Ogawa is a Senior Regulatory Counsel at Sovos Compliance. As part of the Regulatory Analysis team, his main areas of focus are state and federal tax withholding, the Affordable Care Act (ACA), and Canadian tax information reporting. Prior to Sovos, Paul worked as a litigation attorney in Boston area law firms, representing clients in insurance subrogation claims, family law matters, and employment disputes. Paul is a member of the Massachusetts Bar, earned his B.A. from Brandeis University and his J.D. from the Suffolk University Law School.
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