If you are a Canada Revenue Agency My Account holder, you can check your direct deposit information online.
If you receive any quarterly credit via direct deposit, your tax refund will be deposited in the same account.
Here, below, is a CRA link with all the information needed about Direct Deposit and how to contact them.
Direct deposit - Canada Revenue Agency
If needed, here is the link to help you register for My Account. How do I register for CRA’s My Account service?