I can read in Detroit Taxpayer Service Center FAQ's that it takes up to 6 weeks, more during peak, for them to examine your return before sending your refund. Since it is part of your MI return, they have your bank account but I don't see the processing rules used for Detroit.
@ZachU
@SkyB27 @xu8088
According to Detroit Income Tax division:
INDIVIDUAL CITY OF DETROIT INCOME TAX RETURNS FOR TAX YEARS 2015 AND FUTURE YEARS MUST BE FILED WITH THE STATE OF MICHIGAN
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