Hello accounting632,
Welcome back to the Community. I'll be glad to share more info about the powerful payroll module offered in QuickBooks Online.
The CPP2 is a second Canada Pension contribution that applies to workers who earn higher wages. This contribution was released by the CRA as of January 1 2024. For more in-depth info, I encourage you to reference the following link that provide more info about: Payroll Deduction formulas. I also recommend getting in touch with an accounting professional for specifics on how to record the contributions accurately.
Let me me know if this info helps. You're welcome to ask other questions in the comments below. I'll be here to help.