No later than February 28 of the year following the year of discontinuance, file Sales, Use and Withholding Tax Annual. Return (Form 5081) with Treasury.Every employer in this State who is required to withhold federal income tax under the Internal Revenue Code (IRC) must withhold Michigan income tax. The information supplied on the MI-W4 form is used to determine the amount of Michigan income tax to withhold from your paychecks. Download tax forms and learn more about filing taxes with the City. Find a complete listing of City of Lansing employer withholding forms and other information including FAQs and helpful tips regarding taxes. If the last day of the month falls on a Saturday, Sunday, or legal holiday, the next business day shall be considered the final filing date. Web Filing is the preferred method of reporting annual Wage and. Tax Statement (W-2) information. Completing Form W-4.