UltraTax CS: ELF Critical diagnostics

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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.

Click a link to view federal and state ELF Critical diagnostic messages.

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Federal diagnostics

State diagnostics

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Federal diagnostics

State diagnostics

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State diagnostics

Additional information

Electronic filing glossary

E-File Help CenterE-File Help Center

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