回複：pjiang大俠, 再問關於N-470 的問題

You can sub-mit it in person to the local office

The following Local Office(s) service zipcode 62535:
Chicago Field Office.
This office is located at: 101 West Congress Parkway Chicago, IL 60605.

https://egov.uscis.gov/crisgwi/go?action=offices.type&OfficeLocator.office_type=LO