Why do I need to provide OneVest with my Social Insurance Number (SIN)? August 17, 2021 17:04 Your Social Insurance Number (SIN) is required by the Canadian Revenue Agency (CRA) for tax reporting purposes. Related articles What types of accounts can I open with OneVest? Why do I need to complete sign-up before speaking with a Portfolio Manager? How does ID verification work? OneVest Fee Schedule How do I make a deposit?