Locate a task as explained in Display tasks, and then edit a task as explained in Edit a task.

Unassign a task from an user in In Ted4 or Fred4

On the General tab, click the User field and then select <Not set>.

You can assign only one user.

Unassign a task from an user in browser

On the General tab, click the X icon next to the name of the assigned user.

See also

Assign task to a user