Tax error with FixedRate

Hi,

I'm using Nopcommerce 2.2.

When creating a TaxCategory where TaxCategoryID is not 0, tax calculation with FixedRate does not work.

Debugging placing an order:
1. OrderProcessingService.PlaceOrder calls GetShoppingCartSubTotal
2. GetShoppingCartSubTotal calls  _taxService.GetProductPrice.

Problem: GetProductPrice has a hardcoded TaxCategoryID = 0.

        public virtual decimal GetProductPrice(ProductVariant productVariant, decimal price,
            bool includingTax, Customer customer, out decimal taxRate)
        {
            bool priceIncludesTax = _taxSettings.PricesIncludeTax;
            int taxCategoryId = 0; //Is this correct?
            return GetProductPrice(productVariant, taxCategoryId, price, includingTax, 
                customer, priceIncludesTax, out taxRate);
        }

/Regards

Rune Einarsen