To delete a task's timesheets,go to "Time Approval -> Work Items View" under the open project tab. Then, sort the table by task by clicking the corresponding column header to find the task's work items more easily. Finally, open every work item and click the "Delete" button at the button. This will enable you to delete the task thereafter.
Sylvain Traversy
Customer Service and Documentation
support@aceproject.com
http://www.aceproject.com