City Business and Fiduciary Taxes
Homeowner's Principal Residence Exemption
Property Tax Forfeiture and Foreclosure
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If you are claiming a refund on your amended return, you must file it within four years of the due date of the original return (including approved extensions). For example, to amend a 2018 return that was not extended, your return must be postmarked by April 15, 2023.
If a change on your federal return affects your Adjusted Gross Income (AGI) and/or your exemptions, you must file an amended City of Detroit return within 90 days of the change. Include a copy of your amended federal return with all applicable schedules and supporting documents. Submit payment of any tax and interest due.