Please note that this can only happen if you you have another Sprintax Calculus account where you have entered your SSN/ITIN.
If you remember the credentials to your previous account you can log-in to it and remove your SSN/ITIN from the system and then log-in back to your current account and add your details.
If you do not remember the credentials of your previous account, please contact us through calclussupport@sprintax.com