There are two reasons why it will not show on the Project Timeline:
A date was not given to the task.
The task was not associated to a project.
To check if a task has been given a date, navigate to the Task List and use the filter at the top right to find the task. Then, click the edit button and open the schedule portion of the task editor.
From here, click the "Select a Date" button and select a day for the task to take place.
Something else to check is whether or not the task has been associated to a project. In the "Associate With Project Or Lead" field, type in the name of the project and select it from the list to tie the task to the project.
With both the date and the project selected, the task will now be visible on the project timeline.
Questions? Let's Chat.
support@projul.com
(844) 776-5853