The Certify & Route page includes the final compliance questions, a place to add information for the UW reviewers, and the ability to check for any remaining errors. You can route your application to the reviewers. Once routed, you will see a Withdraw button. Use it to withdraw you application for editing. You would then re-route it.
The sections on the page vary depending on the application’s status and whether the person editing it is the PI or not.