In the NextGen UI for Concur Request, you use the More Actions > Send Back to Employee selection.

To send a request back to the request submitter:

1.) Open the request from the Approvals or Requests Pending your Approval page.

2.) Click More Actions > Send Back to Employee.

3.)  In the Send Back to Employee dialog, click enter the reason you are sending the request back, and then click Send Back.

The request is sent back to the request submitter.

After sending back a request to the submitter, when the request submitter resubmits the request, the resubmitted icon, , is displayed for the request on the Approvals > Approvals Home page.