Hi everyone,
I recently started a small business in Ontario and realized I need to get organized with my finances. I’ve heard about a “tax number” but I’m not entirely sure what it entails or how to apply for one.
Could someone explain the process step by step? Specifically, I’m looking for guidance on when it’s required, whether it differs for sole proprietors versus corporations, and any common pitfalls to avoid. I also want to make sure I understand the rules around tax number Ontario registration and usage.
Thanks in advance!


