File is a safe, fast, and easy way to file your tax return. Learn how to pay your income taxes.Information on how to file business and fiduciary income taxes with the city of Detroit. You had to select to file Detroit and go through the information. See Which city tax returns can I do in the TurboTax state program? A PDFfillable copy can be found here. After filling it out, download it to your computer, then attach it here. Visit the Detroit city tax office in person. Obtain tax forms and assistance from staff. City of detroit tax clearance.