Hi Xavier,
It seems the problem disapeared when I set up the rate to my taxe parameter. (and don't seem do be able to "re-break" it to do a screenshot!
I have set the rate on publish and so all my product price are raised by the rate. That works perfectly.
My interrogation is that my cart behaves differently if I am logged in or not. If I am logged out, the cart shows the total, Tax total and final total. As soon as I log in however, it only shows the total (including tax). Is this a setting I have clicked on somewhere?
The default tax category is also set on publish. I understand this is to set up different tax rate for different products but I am confused about what are we publishing with the different settings.
Thank you for your help.