1065-US ELF: Error code R0000-926-01

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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

If "Amended Return", "Superseded Return" or ("Technical Termination" for 1065) checkbox is not checked, then taxpayer TIN in the Return Header must not be the same as a TIN of a previously accepted electronic return for the return type and tax period indicated in the tax return.


This rejection indicates that the IRS has already processed and accepted an electronic e-file containing the Taxpayer Identification Number (TIN) of the rejected return. You must review the following when attempting to resolve this rejection:

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