Kim --
If you are talking about editing the fields in the View My Tasks page, you
need to do the following before you team members can do so:
1. Open Microsoft Project Professional and log into Project Server
2. Open one of your projects
3. Click Tools - Customize - Published Fields
4. Copy the fields you wish edited to the list on the right
5. Select each field individually on the right and select the "Let resource
change field" option for that field
6. Click OK
7. Click Collaborate - Publish - Republish Assignments, then click OK
8. Repeat this process for each project in which you want resources to edit
fields
Hope this helps.