Hello j_peddle,
I'm glad to see that you're a member of the QuickBooks family. If you need a CRA payroll account number, check this community link for more details on how to get one: https://community.intuit.com/articles/1435078-what-is-a-payroll-account-number-and-how-do-i-get-one.
You best course of action is to get in touch with the CRA directly through the "Contact us" page here: https://www.canada.ca/en/revenue-agency/corporate/contact-information.html.
Let me know if you have any other questions.