You will have to print and mail your return even if they amended their return. Once a ssn has been entered into the IRS you can't efile it again.
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...
How to switch from Efile to Mailing your return
https://ttlc.intuit.com/community/print-and-file/help/how-do-i-switch-from-e-file-to-file-by-mail-in...
