Exactly WHAT needs to be sent in with a City filing (in this case, City of Grand Rapids, MI)? Thank you!

Mail Grand Rapids Form CF-1040, pages 1 and 2 with any schedules (such as Wages and Excludable Wages Schedule, Excludible Interest Income, etc.) and any Forms W-2, 1099-R, W-2G to the following address:

Tax Due Returns:

Grand Rapids Income Tax Dept

PO Box 107

Grand Rapids MI 49501-0107

Refund Returns:

Grand Rapids Income Tax Dept

PO Box 106

Grand Rapids MI 49501-0106

Has the address changed to below?

Grand Rapids Income Tax P.O. Box 347 Grand Rapids, MI [removed]

That's very possible since you've posted to a link that's more than 5 years old. If an address is printed with the return that needs to be mailed in the current file would have the most current address.