As a Freelancer, you do have the ability to void a previously submitted Release Request, Invoice or Funding Request. To do so, please log into your account and follow these steps:
Go to the Manage tab in the top navigation bar and then select Billing from the drop down list.
From the Billing List, click on the View link for the request or invoice that you wish to void.
Click on the Void button in the upper right corner of the page. You will be asked to confirm your request.
Once a Release Request has been voided, you will need to submit a Status Report to request the release of that Milestone in the future. When you void an invoice, a notice will not go out to your Client.