Once its start with XF you can't the X is just temporary cause they don't look through your file but when they goes through your file an it deem complete they remove the X so your and your APP now permanent with the F and thier is when they send you the AOR saying your app have received an in process which now you can link, however something to understand is not when your app is delivered your application start is when you received the AOR so your app can be at the office for a year its not recieve by cic until that AOR something to keep in mind.