diff --git a/src/CONST.js b/src/CONST.js
index 72ca7712d962..8b380ae2beef 100755
--- a/src/CONST.js
+++ b/src/CONST.js
@@ -412,6 +412,7 @@ const CONST = {
                 RENAMED: 'RENAMED',
                 CHRONOSOOOLIST: 'CHRONOSOOOLIST',
                 TASKCOMPLETED: 'TASKCOMPLETED',
+                TASKREOPENED: 'TASKREOPENED',
                 POLICYCHANGELOG: {
                     ADD_APPROVER_RULE: 'POLICYCHANGELOG_ADD_APPROVER_RULE',
                     ADD_CATEGORY: 'POLICYCHANGELOG_ADD_CATEGORY',
diff --git a/src/components/ReportActionItem/TaskAction.js b/src/components/ReportActionItem/TaskAction.js
index 265b92c92512..f1e94b0b5ed9 100644
--- a/src/components/ReportActionItem/TaskAction.js
+++ b/src/components/ReportActionItem/TaskAction.js
@@ -49,7 +49,18 @@ const TaskAction = (props) => {
     const taskReportID = props.taskReportID;
     const taskReportName = props.taskReport.reportName || '';
 
-    const messageLinkText = props.actionName === CONST.REPORT.ACTIONS.TYPE.TASKCOMPLETED ? props.translate('task.messages.completed') : props.translate('newTaskPage.task');
+    let messageLinkText = '';
+    switch (props.actionName) {
+        case CONST.REPORT.ACTIONS.TYPE.TASKCOMPLETED:
+            messageLinkText = props.translate('task.messages.completed');
+            break;
+        case CONST.REPORT.ACTIONS.TYPE.TASKREOPENED:
+            messageLinkText = props.translate('task.messages.reopened');
+            break;
+        default:
+            messageLinkText = props.translate('newTaskPage.task');
+    }
+
     return (
         <Pressable
             onPress={() => Navigation.navigate(ROUTES.getReportRoute(taskReportID))}
diff --git a/src/components/ReportActionItem/TaskPreview.js b/src/components/ReportActionItem/TaskPreview.js
index 3059be499f91..394ca5d9e366 100644
--- a/src/components/ReportActionItem/TaskPreview.js
+++ b/src/components/ReportActionItem/TaskPreview.js
@@ -71,9 +71,10 @@ const TaskPreview = (props) => {
                     isChecked={isTaskCompleted}
                     onPress={() => {
                         if (isTaskCompleted) {
-                            return;
+                            TaskUtils.reopenTask(props.taskReportID, parentReportID, taskTitle);
+                        } else {
+                            TaskUtils.completeTask(props.taskReportID, parentReportID, taskTitle);
                         }
-                        TaskUtils.completeTask(props.taskReportID, parentReportID, taskTitle);
                     }}
                 />
                 <Text>{taskTitle}</Text>
diff --git a/src/languages/en.js b/src/languages/en.js
index 5726a5a9089f..ddad4a64e532 100755
--- a/src/languages/en.js
+++ b/src/languages/en.js
@@ -1197,6 +1197,7 @@ export default {
         completed: 'Completed',
         messages: {
             completed: 'Completed task',
+            reopened: 'Reopened task',
         },
     },
     statementPage: {
diff --git a/src/languages/es.js b/src/languages/es.js
index 0d04dea828a5..ed3ca1ba0e04 100644
--- a/src/languages/es.js
+++ b/src/languages/es.js
@@ -1201,7 +1201,8 @@ export default {
     task: {
         completed: 'Completada',
         messages: {
-            completed: 'tarea completada',
+            completed: 'Tarea completada',
+            reopened: 'Tarea reabrir',
         },
     },
     statementPage: {
diff --git a/src/libs/actions/Task.js b/src/libs/actions/Task.js
index 00c2fa4766a0..1dfa8cfc7393 100644
--- a/src/libs/actions/Task.js
+++ b/src/libs/actions/Task.js
@@ -208,6 +208,68 @@ function completeTask(taskReportID, parentReportID, taskTitle) {
     );
 }
 
+/**
+ * Reopens a closed task
+ * @param {string} taskReportID ReportID of the task
+ * @param {string} parentReportID ReportID of the linked parent report of the task so we can add the action
+ * @param {string} taskTitle Title of the task
+ */
+function reopenTask(taskReportID, parentReportID, taskTitle) {
+    const message = `Reopened task: ${taskTitle}`;
+    const reopenedTaskReportAction = ReportUtils.buildOptimisticTaskReportAction(taskReportID, CONST.REPORT.ACTIONS.TYPE.TASKREOPENED, message);
+
+    const optimisticData = [
+        {
+            onyxMethod: Onyx.METHOD.MERGE,
+            key: `${ONYXKEYS.COLLECTION.REPORT}${taskReportID}`,
+            value: {
+                stateNum: CONST.REPORT.STATE_NUM.OPEN,
+                statusNum: CONST.REPORT.STATUS.OPEN,
+            },
+        },
+        {
+            onyxMethod: Onyx.METHOD.MERGE,
+            key: `${ONYXKEYS.COLLECTION.REPORT}${parentReportID}`,
+            value: {
+                lastVisibleActionCreated: reopenedTaskReportAction.created,
+                lastMessageText: message,
+                lastActorEmail: reopenedTaskReportAction.actorEmail,
+            },
+        },
+        {
+            onyxMethod: Onyx.METHOD.MERGE,
+            key: `${ONYXKEYS.COLLECTION.REPORT_ACTIONS}${parentReportID}`,
+            value: {[reopenedTaskReportAction.reportActionID]: reopenedTaskReportAction},
+        },
+    ];
+
+    const successData = [];
+    const failureData = [
+        {
+            onyxMethod: Onyx.METHOD.MERGE,
+            key: `${ONYXKEYS.COLLECTION.REPORT}${taskReportID}`,
+            value: {
+                stateNum: CONST.REPORT.STATE_NUM.SUBMITTED,
+                statusNum: CONST.REPORT.STATUS.APPROVED,
+            },
+        },
+        {
+            onyxMethod: Onyx.METHOD.MERGE,
+            key: `${ONYXKEYS.COLLECTION.REPORT_ACTIONS}${parentReportID}`,
+            value: {[reopenedTaskReportAction.reportActionID]: {pendingAction: null}},
+        },
+    ];
+
+    API.write(
+        'ReopenTask',
+        {
+            taskReportID,
+            reopenedTaskReportActionID: reopenedTaskReportAction.reportActionID,
+        },
+        {optimisticData, successData, failureData},
+    );
+}
+
 /**
  * @function editTask
  * @param {object} report
@@ -450,6 +512,7 @@ export {
     setAssigneeValue,
     setShareDestinationValue,
     clearOutTaskInfo,
+    reopenTask,
     completeTask,
     clearOutTaskInfoAndNavigate,
     getAssignee,
diff --git a/src/pages/home/HeaderView.js b/src/pages/home/HeaderView.js
index 1f78b28fa125..2ed0b337aaae 100644
--- a/src/pages/home/HeaderView.js
+++ b/src/pages/home/HeaderView.js
@@ -103,9 +103,7 @@ const HeaderView = (props) => {
             threeDotMenuItems.push({
                 icon: Expensicons.Checkmark,
                 text: props.translate('newTaskPage.markAsIncomplete'),
-
-                // Implementing in https://github.com/Expensify/App/issues/16858
-                onSelected: () => {},
+                onSelected: () => TaskUtils.reopenTask(props.report.reportID, props.report.parentReportID, title),
             });
         }