Welcome to the Community, Nacorom.
For me to be able to provide you with the right answer, could you please tell me what pitfalls other than taxes you're referring to in QuickBooks?
Also, what type of POS application do you want to integrate with the Canadian version of QuickBooks?
Any additional information would be highly appreciated.
I hope you can respond to me on this thread so we can work on your concern together, Nacorom. Please know I'm ready to assist further whenever you have additional account-related concerns. Have a good one.