---
title: Modify a project task dependency
description: Modify a dependency when editing the tasks that are linked in the dependency, the dependency type, or the lag time.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/it-business-management/project-management/t\_ModifyProjectTaskDependencies.html
release: australia
product: Project Management
classification: project-management
topic_type: task
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Create a dependency from the planning console, Using Planning console - Legacy, Using Project Management, Project Management, Project Portfolio Management, Strategic Portfolio Management]
---

# Modify a project task dependency

Modify a dependency when editing the tasks that are linked in the dependency, the dependency type, or the lag time.

## Before you begin

Role required: it\_project\_manager

## About this task

Project task dependencies are saved on the Planned Task Relationship \[planned\_task\_rel\_planned\_task\] table. You can access dependencies from the planning console.

## Procedure

1.  Double-click a dependency on the Gantt chart of the [planning console](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-business-management/project-management/c_TheProjectPlanningConsole.md).

2.  On the form, fill in the details.

    For more information, see [Planned Task Relationship form](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-business-management/project-management/planned-task-relationship-form.md).

    \[Omitted image "planned\_task\_relationshipform.png"\] Alt text: Planned Task Relationship form

3.  Select **Update**.

    You can view dependencies in the Project Task related list on a Project or Project Task form and from the Project Tasks list on the workbench. These columns show the dependencies:

    -   The **Dependency** column shows the successor task in the relationship.
    -   The **Dependencies** column shows the dependency value. See [Predecessor dependencies in the planning console](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-business-management/project-management/r_ProjectTaskDependencyValues.md) for a description of what you see in this column.

**Parent Topic:**[Create a dependency from the planning console](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-business-management/project-management/t_CreateADependency.md)

**Related topics**  


[Create a dependency from the planning console](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-business-management/project-management/t_CreateADependency.md)

[Remove a dependency](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-business-management/project-management/t_RemoveDependencies.md)