Hi
0) Be explicit ..........( location page title content )
is displayed where ?
How it has been configure ? using which html page ?
View tax in BackEnd or FrontEnd ?
1) in which extension ( name of component , link , module ) the tax appear ?
when you write card it mean something i don't know ....i guess it is hikashop cart Module
2) You must think hikashop like aleyr so you have to go global and then go specific ( inherit concept) .
The global is component ->Hikashop ->configuration ( in fact this word mean main )
then you have to follow the capture screen
3) after you have to go to extension that let you configure display /view .
So you have to go to component ,
module , menu link .... refer to 1) .
In way only hikashop extension manage their own field so you have to search in the html page the options / label that ll let you achieve what you want ...
4) if you take care of the label Show tax price . You ll see that this label appear in Two diferent page .: it is the concept of "héritage" .
hope this ll help you .Hikashop is efficient and ll be power full with REST API / php coding
regard's