You can use the InsertOrSubmit API of your data context object to save the changes and the inserted data. Here is a simple example using your codebase:
TRACKING data = (from t
radGridView1.DataSource = BindingList<TRACKING>(data);
BindingList<TRACKING> list = (BindingList<TRACKING>)radGridView1.DataSource;
More information about CRUD using LINQ and Entity framework you can find in this article.
I hope this helps. Let me know if you need further assistance.
the Telerik team