Hello, voici un script à passer sur la base de donnée, version prestashop 1.6
-- Statements for update price and tax rules group
UPDATE ps_product SET price = price / 1.2, id_tax_rules_group = 8 WHERE id_tax_rules_group = 0;
UPDATE ps_product_shop SET price = price / 1.2, id_tax_rules_group = 8 WHERE id_tax_rules_group = 0;
-- Statements if you want to round ht price to 2 decimals
UPDATE ps_product SET price = ROUND(price, 2)
UPDATE ps_product_shop SET price = ROUND(price, 2)