Unfortunately you will need to wait to see if it has been rejected or accepted in order to add the 1095-A information that is missing. Your return will go from pending to either accepted or rejected, you can check the status here: https://ttlc.intuit.com/community/return-status/help/how-do-i-check-my-e-file-status/00/25538
If it has been rejected you will be able to log back into your account, add the missing 1095-A information and correct any errors that caused the rejection, and then re-file the return.
If the return has been accepted, you will need to file an amended return using form 1040X to report the 1095-A information. The 1040X will be available mid-February, you can keep checking here: https://ttlc.intuit.com/community/forms/help/irs-forms-availability-table-for-turbotax-individual-pe...
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