U.S. Government regulations now require all individuals applying for U.S. visas to submit DS-160 visa application forms that are fully accurate and complete.  

Individuals presenting applications containing omissions or errors in biographical data (i.e. name, date of birth, place of birth, passport number, any prior or maiden names, gender)  or purpose of travel will be required to correct the omissions and/or errors to their online applications before their interviews can take place.   

Those applicants will be asked to complete the corrections and return to the Embassy at a later time to complete processing of their visa applications...