Hi Allison34,
Welcome to Community! QuickBooks Online Payroll is a dynamic way to pay your staff with confidence. It's important that you're able to omit particular taxes that aren't applicable to your employees. I'd be happy to help!
When you add an employee, you'll set up the TD1 form and scroll to the bottom where you'll see Tax Exemptions. Use the ▼ dropdown menu and check the box for Canada Pension Plan. This will exempt the employee from paying CPP. However, it's important that you're sure the employee should be exempt by following this link. In addition, here's a helpful Employers' guide for payroll deductions and remittances, for your reference.
Another helpful guide would be how to edit/change employee information.
Please don't hesitate to reach back out if you have any other questions. Your success is our number one priority and we'd love to help!