To edit time,

1. Go to Timesheets > Time Editor in the sidebar

On Time Editor, you can edit various details of tracked time. These include the start and end times of intervals, activity descriptions, tasks, and projects. 

List, Daily Calendar, and Weekly Calendar views

The Time Editor offers three views:

• List
• Daily Calendar
• Weekly Calendar

To edit time in the Daily Calendar and Weekly Calendar views, click on the time interval you want to change.

Smart Fill

Smart Fill option is available starting from the Plus plan.

If you did not have time to write activity descriptions, or track on the necessary project and task, you can use the Smart Fill option to have the needed fields filled in. This feature is powered by WebWork AI, and fills in the gaps based on its analysis of your used apps and websites, activity. Firstly, click on the button:

Then, checkmark all the fields that you need to fill (note, that if the tasks or projects are not created prior to this, those fields will remain blank):

As you see, the activity description fields is filled in now, according to what I was doing during the mentioned time, nonetheless the tasks section appears to be the same (even though I checkmarked it as well), since I have not created any tasks under the current project.