1040-US ELF: Error code X0000-029

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MFA required for electronic filing

Effective May 3rd, the 2017 version of UltraTax CS requires multi-factor authentication (MFA) to transmit e-files from CS Connect. Find out more.

Error code X0000-029: A binary attachment submitted in the PDF format must begin with the file header "%PDF-".

Verify that all return attachments are in PDF format and open without receiving any errors. Once these two items are reviewed and corrected, you can recreate and resubmit the electronic file. For more information regarding e-File attachments, refer to Attaching Portable Document Format (PDF) files to electronic files.  

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