How to change the price to include VAT

Hello,

Basically, you can't (or it won't be what you think).

In the HikaShop backend, you see the price without taxes, it is the same thing in HikaMarket.
Taxes are displayed dynamically depending the user address (or the store default tax zone if the customer do not have an address yet).

So displaying the prices with taxes in HikaMarket will mean that we base the display of the price on the vendor default billing address.
It might be a "good" value but it's not an accurate and precise value.

If you want to use "floating taxes" in HikaShop, you will have better results in the back and in the HikaMarket front-end.
But it requires a big modification in the configuration since it will affect every prices in your store and it's better to start with floating taxes.
For more details, you should open a new thread in the HIkaShop section of the forum.

But overriding HikaMarket to force the display of prices with a tax but when you don't know what will be the selected tax zone ; is not a good idea.

Regards,