If your process administrator has configured the process to allow end users that submit requests to copy their previously submitted requests, you can select the "Copy Request" button from within the Request Detail tab of your request. Two other preconditions must also be true:
1) A form task must be the first task in the process for this feature to be usable.
2) you can only copy requests for which you were the original requester.
You will be given an option to name the new copy of the request:
Once you hit "OK" you will be taken to the initial form you previously completed. It will have the same options selected and entered as the original form.
You can then submit the form to start a new request.