Hello,
In order to be sure to understand you well, and detailled more our help, can you have a look and make your returns about this specific points :
1. Retail user, see only only retail price (price with tax)
2. wholesale registered users, see only only price without tax.
If yes, then maybe you can in your tax Acl to create tax restrictions for required user group.
OR you want display for everybody the 2 different price but only display all price and precise for each group different price, like this by example :
Price :
for retail user : 120 Euro (with tax)
for wholesale user : 100 Euro (without tax).
And then maybe you can have a look on
this thread
to see how to add tag html that will allow you to split price with tax AND price without tax, but you have to have stetted your "Show taxed prices" to "Display both".
In Main HikaShop Configuration, Main tab => Taxes part.
Hope this will help you to get what you need.
Regards