You can add estimates for task in Time Estimate field on task.
![estimated-time](https://help.hyperdone.com/wp-content/uploads/2020/08/estimated-time.png)
Just enter value in hours and minutes or pomodoros in time estimate field or choose recently used values from dropdown.
In the same way you can enter Time spent value – actual time you work on that task.
On each task you can also add due date by choosing date from due date field.
![due-date](https://help.hyperdone.com/wp-content/uploads/2020/08/due-date.png)