I live in Windsor as Canadian Permanent Resident and I recently explored a business opportunity.

There is a US Company who sells its services as products to its US and Canadian customers. This company needs the telemarketing of its products so the company can have better sales. I can become the Canadian Associate of this company and I will ask my cousin’s call center in India to do the telemarketing for this company. US company will pay me the commission in Canada for the sales made by me, and I will keep my cut (some percentage) and the rest of the money will go to my cousin’s company in India as his call center in India will do the most of the work. How do I make sure that my cut covers the tax and legal liabilities in Canada?

I recently registered my company as Sole Proprietorship online and got its Business Number. I want to know what other legal formalities are involved, before I start the business with the US and Indian Company.

Do I have to resister for GST/HST or any other federal / provincial number? What kind of agreements should I sign before even I start any transaction? What is advisable for me?

It depends: Are YOU shipping the product to Canadian residents? Are you collecting the money ? If you are the agent handling the product you may need to get various licenses depending on the product you sell. At the very least you need to register as a vendor.