If you efile and it was rejected for a duplicate SS# then your only option is to mail in the return and attach a form 14039 to it ...
https://turbotax.intuit.com/tax-tips/security/guide-to-irs-form-14039-identity-theft-affidavit/L7YTP...
https://www.irs.gov/newsroom/when-to-file-a-form-14039-identity-theft-affidavit
