For those who are facing the same unexplainable and silly issue (and that's me being nice)
You need to add the Tax field in the Footer, for some reason that hides the Tax in the description on the colums section.
And then you switch the font color of the Tax field to white (or the color that you need to make it invisible)
Intuit just doesn't care to fix simple issues. (and again that's me being nice)
Sorry for my grammar, english is not my native languaje.
