Verify that you entered the dependent's name and Social Security number exactly as it is entered on the dependent's Social Security card.
If it is correct and the IRS continues to reject the tax return then you will have to print and mail the return.
See this TurboTax support FAQ for how to print a tax return for mailing when using the online editions - https://ttlc.intuit.com/turbotax-support/en-us/help-article/printers-printing/print-mail-return-turb...
