I am trying to find out if there is a way to make it so that the prices are marked without tax for a certain customer group, and the rest would see the prices including tax.
Either as an extension, or code, i have tried code that someone posted on another forum but it didnt work.
thanks in advance
I suggest you trying Customer Group Without Tax Extension to meet your requirement
This extension allows your online store to show prices and reject taxes for chosen customer groups. Therefore, when you choose a customer group who cannot see taxes in their cart, product lists and on Magento checkout page, taxes are not shown for this group and prices with taxes are shown for other customer groups.