src/models/ShopOrderItem.php
public function getMoneyVat()
    {
        if ((float)$this->vat_rate == 0) {
            return new Money("0", $this->currency_code);
        }

        $value = $this->money->getValue();
        $calculateValue = $value - ($value * 100 / 118);

        return new Money((string)$calculateValue, $this->currency_code);
    }
public function getMoneyVat()
    {
        if ((float)$this->vat_rate == 0) {
            return new Money("0", $this->currency_code);
        }

        $value = $this->money->getValue();
        $calculateValue = $value - ($value * 100 / 118);

        return new Money((string)$calculateValue, $this->currency_code);
    }
Значение налога за одну единицу товара

@return Money