Yeah that sounds pretty strange. Sorry, there’s no way to retrieve it. All the information the form asks for is personal and factual so it would be assumed that you know or can access it all, no reason for them to have a way to retrieve it.I gave my information to my brother to filled during my application, but he filled a wrong birthday during my application that he forgot. now I am unable to to proceed my Ds-260 form. and my brother does not anymore remember the Birthday that he filled during my application