Here’s how to mark a task as complete in Microsoft Project, step by step:
- Open your Microsoft Project and you'll see a bunch of tasks.
- Select the task you want to mark as complete.
- In the 'Schedule' group, choose '100% Complete' to mark the task.
- You can also click on 'Mark Track'.
- Then, you can see tasks that are 100% completed under the 'Completed' column.



