When going through this process, it seems like the listing for "nonresident" is the correct option. After reviewing information from another post, it was suggested to look into filing a Form 5119, 2020 City of Detroit Nonresident Income Tax Return.
Form 5119 Info: https://www.michigan.gov/taxes/0,4676,7-238-73294-522100--,00.html
Though when going through the directions you provided, I was given a City of Detroit Part-Year Resident Income Tax Return (Form 5120). I'm a little confused on this, and what information would need to be provided in the Form 5120, or if this is even the proper form to fill out as I was not technically a resident of Detroit, but commuted and worked in Detroit from January to March.
