condition added for tax

resources/assets/js/views/common/documents.js

@@ -470,11 +470,13 @@ const app = new Vue({
 
             let selected_tax;
 
+            if (this.dynamic_taxes.length) {
                 this.dynamic_taxes.forEach(function(tax) {
                     if (tax.id == this.tax_id) {
                         selected_tax = tax;
                     }
                 }, this);
+            }
 
             this.items[item_index].tax_ids.push({
                 id: selected_tax.id,