In your case, you were working from home, correct?
If yes, provide Toronto as city where company is located on 6F.
If you need to explain more, use another blank page and write 6F and provide details there that the company was based in toronto but you were working from home in hamilton, ontario.
If you need more space for any section, use an extra sheet of paper and indicate the number and/or letter of the section you are completing and submit it along with your application