M-Form Late Filing Penalty

April 6, 2022

To: Manufacturers, Real Estate Owners and Preparers


  • Disregard this reminder if you already filed your 2022 M-Form
  • Extended 2022 M-Form filing deadline was Friday, April 1, 2022

IMPORTANT – Note to Recipient

Your email address is associated with the manufacturing account identified in the subject line as a company contact or an authorized user within the Wisconsin Department of Revenue's (DOR) Manufacturing Assessment System (MAS).

Take action – if you are the:

Filing M-Forms late – after April 1 extended deadline

Under state law, all manufacturers with a filing extension must file the 2022 Manufacturing Property Return (M-Form) by April 1, 2022.

Electronically file (e-file) your M-Form

DOR recommends e-filing your 2022 M-Forms through our Manufacturing Assessment System (MAS). M-Forms can still be e-filed after the April 1, 2022, extended due date. The MAS system automatically time stamps returns when the preparer designates the form as complete. Penalties are assessed based on the e-file date.


To avoid a delayed response, contact the district office in your area.