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. They are described in the following articles.