Yes, you can use the same email address to manage both your Canadian and U.S. QuickBooks Online (QBO) accounts, Jiaoyue.
Each QuickBooks account is associated with a specific company, and you can use the same email address to log in across multiple accounts. To prevent receiving a notification that your email is already in use, ensure you update the user ID in your U.S. account.
You can refer to this article to learn how to create a new company file and explore the different QuickBooks pricing options: Create or add another company file.
After completing the signup process, you’ll be able to access both your Canadian and U.S. companies using the same email login. You can easily switch between the two by navigating through the settings menu in QuickBooks.
If you need any further assistance with QuickBooks, please don't hesitate to contact us.
