Hi treasurer116,
It's essential that your sales tax is calculated accurately in QuickBooks Online. In your situation, the best course of action is to contact us at 1-855-253-1536 from Monday to Friday between the hours of 9 AM and 8 PM EST. With your consent, a member of our Customer Care team will be able to work with you virtually and ensure your sales tax is aligned with CRA guidelines.
Feel free to reach out again, if you have additional questions or concerns. We would be glad to assist!