You will not be able to submit a graduate through the portal without a SSN. You should not enter a ‘dummy’ SSN in order to proceed (such as 999999999).

If you have a student without a SSN, you will need to send the traditional school lists, as you have done in the past (provided their graduation date is within the last year). If the graduation date is more than a year in the past, you would submit an official transcript.