Is Quickbooks supposed to automatically start deducting CPP when the employee turns 18? I thought this was supposed to happen as long as the birthdate was entered?

Hi there, 

Thanks for posting in the Community. It's good that your employee is growing in your company. I'll be happy to share more info on this. 

Once an employee turns 18, QuickBooks will start to automatically deduct CPP on their paycheques. The same will happen once your employee turns 70. You'll notice that the CPP won't be deducted anymore since CPP only calculates on employees between 18 and 70 years of age.

To learn learn more about CPP, check out this helpful article: Troubleshoot CPP or EI pay cheque deduction errors. Let me know if you have other questions. I'm here to help get you back on track. 

Quickbooks did not do this, I had to go back to June 2018 and pay both shares, now I'm waiting for my penalties and interest invoice. I'm looking for grounds to appeal. Why would my softwear not catch this?

I see what you're saying. The only way this would be possible is if you made the employee exempt from CPP when you set up their profile. If the employee was initially setup as "exempted from taxes" the system won't automatically start deducting CPP until you manually adjust the tax exemption settings. Feel free to ask questions.