I'd be more than happy to help. You can activate the payroll service inside your existing QuickBooks Online account.
To turn it on, please follow these steps:
Go to the left-hand side menu and click Employees.
Click Get Started or Set up Payroll.
Choose the type of service that you want to use.
Follow the onscreen instructions to complete setting up your payroll account.
If for whatever reason you get stuck on any of the steps you can now request a callback feature right inside your QuickBooks Online to speak with an Intuit QuickBooks Online customer support agent during regular business hours to help you: