Click in the vertical menu on right side of the Info tab. Click , enter the time and a short description of the work being done.
Time entries cannot be recorded for future dates nor dates prior to the project start date. Nor can entries fall outside the timeframe between the Start and Due dates of the task. Entries must be at least 5 minutes.
Users will need view permissions in tasks to perform this action. Depending on the user's project permission settings, they may be able to view all project tasks or just a subset. Watchers specifically added to the task will be able to view it and log time.