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 access the electronic filing transmission feature in CS Connect.

Thomson Reuters is committed to proactively evolving our security features to help you protect your firm and your clients' data. For more information about multi-factor authentication, see Multi-factor authentication overview.

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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