diff --git a/app/Utils/HtmlEngine.php b/app/Utils/HtmlEngine.php
index ff4ceaa17eba..45512439cd73 100644
--- a/app/Utils/HtmlEngine.php
+++ b/app/Utils/HtmlEngine.php
@@ -335,6 +335,10 @@ class HtmlEngine
         $data['$task.tax_name3'] = ['value' => '', 'label' => ctrans('texts.tax')];
         $data['$task.line_total'] = ['value' => '', 'label' => ctrans('texts.line_total')];
         $data['$task.service'] = ['value' => '', 'label' => ctrans('texts.service')];
+        $data['$task.task1'] = ['value' => '', 'label' => $this->helpers->makeCustomField($this->company->custom_fields, 'task1')];
+        $data['$task.task2'] = ['value' => '', 'label' => $this->helpers->makeCustomField($this->company->custom_fields, 'task2')];
+        $data['$task.task3'] = ['value' => '', 'label' => $this->helpers->makeCustomField($this->company->custom_fields, 'task3')];
+        $data['$task.task4'] = ['value' => '', 'label' => $this->helpers->makeCustomField($this->company->custom_fields, 'task4')];
 
         if ($this->settings->signature_on_pdf) {
             $data['$contact.signature'] = ['value' => $this->invitation->signature_base64, 'label' => ctrans('texts.signature')];