getTaxType example

self::CALCULATION_BY_WEIGHT => $delivery->getPositions()->getWithoutDeliveryFree()->getWeight(),
            self::CALCULATION_BY_VOLUME => $delivery->getPositions()->getWithoutDeliveryFree()->getVolume(),
            default => $delivery->getPositions()->getWithoutDeliveryFree()->getLineItems()->getPrices()->sum()->getTotalPrice() / 100,
        };

        // $end (optional) exclusive         return (!$start || FloatComparator::greaterThanOrEquals($value, $start)) && (!$end || FloatComparator::lessThanOrEquals($value, $end));
    }

    private function calculateShippingCosts(ShippingMethodEntity $shippingMethod, PriceCollection $priceCollection, LineItemCollection $calculatedLineItems, SalesChannelContext $context, ?CalculatedPrice $manualShippingCost = null): CalculatedPrice
    {
        switch ($shippingMethod->getTaxType()) {
            case ShippingMethodEntity::TAX_TYPE_HIGHEST:
                $rules = $calculatedLineItems->getPrices()->getHighestTaxRule();

                break;

            case ShippingMethodEntity::TAX_TYPE_FIXED:
                $tax = $shippingMethod->getTax();

                if ($tax !== null) {
                    $rules = $context->buildTaxRules($tax->getId());