To change your project's submission date, first, go to Manage and select Manage account:

It will prompt you to a new page, and you'll see the Estimated Delivery Date. Click the drop down, and select your estimated delivery date. Once done, click on Update Information. 







It will show a Done window indicating that the changes have been made. To finalize the approval date, please contact your account manager to confirm changes, and re-calculate the updated approval date, you'll see their details on the same category, just scroll down.