Hello,
Because it was your very first message in the forum, unfortunately we do not have your HikaShop version or your website link.
Would it be possible to have a link to your website so we can have a closer look ?
Having a screenshot of one of your product configuration could help to see how you configured the prices.
(And it could be also useful to have details about your tax configuration).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.