If you miss a deadline, that level usually closes—no extensions. If you missed the Assessor's deadline, you may still file at the Board of Review if its window is open. If you missed the Board of Review, you generally can't go to PTAB (which requires a prior Board of Review filing) and must wait for the next cycle (properties are reassessed every three years).
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What happens if I missed my township's property tax appeal deadline?
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