Once you’ve created a task, you can edit or update it to show your progress.
Double-click the task that you want to update.
The Task item window opens, where you can make changes to the task. You can do things like change the start or due date, select a new status or priority, or update the completion percentage.
Update the task’s information using the available options.
Remember, you can only enter start and completion dates and percentage of completion information in standalone Task items, not in email messages or contacts flagged as To-Do items.
When you finish a task, you can check it off your Tasks list by marking it as complete. Completing a task will hide it from the To-Do list, or any other Task view that only displays active tasks.
Click the task’s check box.
The task is completed, as indicated by a strikethrough and a check mark next to the task.
You can also select a task and click the Mark Complete button on the ribbon, or right-click a task and select Mark Complete.