question

I want to add custom service tax with the order i am try this

            TaxRate taxRate = new TaxRate();
            taxRate.setIsDefault(true);
            taxRate.setName("service");
            taxRate.setRate(30l);
            List<TaxRate> taxRates = new ArrayList<>(); taxRates.add(taxRate);
            lineItem.setTaxRates(taxRates);
            orderConnector.addServiceCharge(mOrder.getId(),"service");

to add service tax i think addservicecharges not add tax within order ,it take default service charges is their any suggestion ?