Function that returns the tax rate of a given tax code

This function can be used to find the tax rate of a given tax code. Saved search is used for this purpose

  function searchTaxRate(line_tax) {
  try {
       if (line_tax) {
         var salestaxitemSearchObj = search.create({
              type: "salestaxitem",
              filters: [
                  ["internalidnumber", "equalto", line_tax]
                  ],
              columns: [
                  search.createColumn({
                        name: "name",
                        sort: search.Sort.ASC,
                        label: "Name"
                      }),
                  search.createColumn({
                         name: "rate",
                         label: "Rate" })
               ]
         });
     var searchResult = salestaxitemSearchObj.run().getRange({
         start: 0,
         end: 1
        });
   var tax_rate
   for (var j = 0; j < searchResult.length; j++)
   {
    tax_rate = searchResult[j].getValue({
               name: "rate",
               });
     log.debug('tax_rate', tax_rate)
   }

   return tax_rate;
    } else {
          return false;
   }

  } catch (e) {
         log.debug('e', e)
        }
}