Hi,
It's not possible to export products with the price including VAT.
However, it is possible to import products with prices including VAT. In your CSV file, instead of using the column name "price_value", you can use the column name "price_value_with_tax". Make sure you also include the product_tax_id column to specify the id of the tax category.
That way, during the import, HikaShop will calculate back the price without taxes based on your main tax zone (HikaShop configuration) and these two columns and the tax rules you've configured in System>Taxes.