Selectize.js update custom tax container

gistfile1.js

jQuery('.single-option-selector').selectize({

        {% if shop.currency_code == "EUR" %}
          {% assign money_symbol = "€" %}
        {% endif %}

        {% if shop.currency_code == "USD" %}
          {% assign money_symbol = "$" %}
        {% endif %}

        onChange: function(value){
          $(".tax_amount_display").text("");
          setTimeout(function(){
            $.ajax({
              url: "{{product.url}}" + ".json",
              type: "GET",
              success: function(data) {
                if (data.product.id == getUrlParameter("variant")) {
                  $(".tax_amount_display").text(Shopify.formatMoney(data.product.tax_amount, "{{ shop.money_format }}") + " {{money_symbol}}")
                }
                else {
                  for (x = 0; x < data.product.variants.length; x++) {
                    if (data.product.variants[x].product.id == getUrlParameter("variant")) {
                      // console.log(data.product.variants[x])
                      $.ajax({
                        url: data.product.variants[x].product.full_url + ".json",
                        type: "GET",
                        success: function(data_inner) {
                          $(".tax_amount_display").text(Shopify.formatMoney(data_inner.product.tax_amount, "{{ shop.money_format }}") + " {{money_symbol}}")
                        }
                      });
                    }
                  }
                }
              }
            })
          }, 50);
        }
      });