Thanks for messaging us here. I'll be happy to share more info about employee taxes in QuickBooks so you can continue to do the things you enjoy the most.
QuickBooks is designed to deduct CPP on employees over thee age of 18. In case this is a browser issue that's preventing the CPP from being calculated, I recommend clearing cache and cookies on your browser. Clearing cache and cookies is a great way to clean your browser allowing it to work more efficiently. Here's an article that shows you how to do that: How to clear cache and cookies. If this doesn't work, I suggest using a private/incognito window to see if that works instead. In case this issue persists, I encourage you to contact our support team so they can assist you further with this. Here are our contact details:
Schedule a Callback or start a Chat: click(?) in the upper right in QuickBooks Online > enter "Contact support" > choose Contact Us > provide a brief summary > select Let's Talk > choose Get a callbackor Start a Chat.