Prices should not include taxes

-- HikaShop version -- : 4.0.0
-- Joomla version -- : 3.9.0
-- PHP version -- : 7.2
-- Browser(s) name and version -- : Firefox latest

Hi!
I've read about everything related to that in the forum but nothing seems to be recent.
Once a day I import all products to refresh inventory. The import file includes all price variants without taxes. However, when display on the web, the price include the taxes even if the price provided is without taxes.
For instance, a product with the following price options :
$0.93 ($0.80 Hors Taxes) l'unité pour au moins 25 achetés.
$0.72 ($0.62 Hors Taxes) l'unité pour au moins 251 achetés.
$0.63 ($0.54 Hors Taxes) l'unité pour au moins 501 achetés.
$0.53 ($0.46 Hors Taxes) l'unité pour au moins 1001 achetés.
$0.43 ($0.37 Hors Taxes) l'unité pour au moins 3001 achetés.
The real basic price is the one highest one and the taxes should be put on top of this and not included.

Where is this settings ? (there are so many...)