Did you check whether she uses her maiden name or the husband's last name on the social security card?  A lot of times, that's the cause of the rejection.

If everything checks out, make sure you have the correct DoB.

Your last resort would be to have her call the SSA to verify the records.  And failing which, the return will have to be filed on paper.

See also this recent discussion for reference: https://proconnect.intuit.com/community/lacerte-discussions/discussion/e-file-diagnostic-regarding-t...