February 24, 2026
To: Manufacturers , Tax Professionals
Disregard this reminder if you already filed or requested an extension to file your 2026 M-R form
The Wisconsin Department of Revenue (DOR), State and Local Finance Division would like to remind state-assessed manufacturing property owners of the upcoming March 2 deadline for filing the 2026 Manufacturing Real Estate Return (M-R form).
Important
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Filing deadline – Monday, March 2, 2026
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M-R form – located in
My Tax Account (MTA)
Account Filing Information
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Filing status – review the
check account filing status instructions if you are unsure whether you already filed, still need to file, or requested an extension
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Request an extension – you may request a filing extension to April 1
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March 2, 2026 deadline – submit your filing extension request by March 2
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April 1, 2026 extended due date – if you request an extension by March 2, you have until Wednesday, April 1 to file
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Late filing penalty – if you do not file your M-Form or file it late, you will receive a non-filing penalty and lose the right to appeal your assessment. See Late filing penalty.
Questions?