5500 - US ELF: Error Code CSISU01

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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.

You must use the following attachment title for the attached, signed Form 5500 / 5500-SF, Pages 1 and 2: "Manually signed form 5500 or 5500-SF under e-signature option for service providers." If you use the "Other Attachment" title, the return will generate Error CSIUS01 while the e-file is being created in UltraTax CS.

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