public IActionResult UpdateRateByCountryStateZip(CountryStateZipModel model)
        {
            if (!_permissionService.Authorize(StandardPermissionProvider.ManageTaxSettings))
            {
                return(Content("Access denied"));
            }

            var taxRate = _taxRateService.GetTaxRateById(model.Id);

            taxRate.Zip        = model.Zip == "*" ? null : model.Zip;
            taxRate.Percentage = model.Percentage;
            _taxRateService.UpdateTaxRate(taxRate);

            return(new NullJsonResult());
        }