Did your return reject because he claimed himself? Sorry, you now have to print and mail your return. You don't have to wait for them to amend. Even if they amend, it won't release their ssn in the IRS system.
How to switch from Efile to mail. This one has a Video
https://ttlc.intuit.com/community/print-and-file/help/how-do-i-switch-from-e-file-to-file-by-mail-in...
How to mail a return from the Online version
https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...
Be sure to attach copies of your W2s and any 1099s that have withholding on them. You have to mail federal and state in separate envelopes because they go to different places. Get a tracking number from the post office when you mail them for proof of filing.
Son - How to Amend this year
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...
