we are from Montreal and we have 2 taxes, I have been trying to add them in Acuity but it doesn't let me do it. So, I was wondering if there is a way to add them with Square.
I am not familiar with Acuity, but you can most certainly add 2 different taxes in Square. Go to your "Dashboard" and click on "Items". On the left hand side there is a list - 5th item down is "Taxes". This is where you can add the tax. I'm in BC and have 2 taxes as well - setup here and works perfectly.