Hi there,
Running payroll with QuickBooks Online means that you're able to get all your work done in one place. This helps save you time and keeps you organized.
You're unable to adjust the CPP deductions in QuickBooks Online payroll, as the maximum amount is stagnant based on the Federal Government regulations. Don't worry, if your employee has overpaid CPP, they'll receive a credit at the end of the fiscal year.
Fore more information about CPP deductions, take a look at the CRA website: Canada Pension Plan (CPP).
I hope this helped to answer your question. If you have any other questions, please let me know.
Have a great day!