If I e-file payroll taxes through Quickbooks, is the PD7A also efiled or do I need to do that online through the CRA website?

Hello cbeaton1, 

It's great to have you connect with us here in the Community. QuickBooks is an essential program that simplifies the way you manage your transactions. I'll be happy to share more details and help make sure you're on the right track. 

QuickBooks provides the tools and resources that simplify the way you manage your sales tax. With the tax info you get from QBO, you can use that info to then file your sales tax through payroll to the CRA. I encourage you to check out this helpful article here that provides more info about managing payroll taxes in QuickBooks. 

Let me know if the info helps. I'll be one message away in case you need anything else.