How to remove VAT from the Bitrix cart?

Question

1C-Bitrix

Hello.
Issue: A certain group of users should not have VAT counted at checkout.
The tax exemption does not work because the tax is included in the price. How to solve the problem?

Answer 1

As far as I know, the goods can be added to the cart by specifying their own price. There, when creating a BasketItem, you must set the CUSTOM_PRICE flag.
In addition, when receiving the price of the goods, an array is returned, where, in addition to the usual prices, the prices with tax are also indicated.
It remains only in the handler for adding goods to the cart to add a check for the user group and, in a certain case, assign a price without tax to the cart element.