Hello User-1599,
I appreciate you reaching out to us here. It is very concerning to have CPP discrepancies with CRA, when using QuickBooks Desktop Payroll. With this being in relation to only a few employees, I encourage you to contact our QuickBooks Desktop specialists outside of Community. They will be able to review the issue in more depth from their end, and ensure your payroll is accurate and aligned with government guidelines as soon as possible!
You can reach out to them using the methods outlined in the QuickBooks Desktop software support policies.
If you have any other questions or concerns, feel free to reach back out. We would be happy to help!