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.