1040 - US ELF: Critical and/or ELF Critical Diagnostic - Business activity is required on Screen 4562, unit 1 in the Business folder

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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.


Typically, this diagnostic is generated due to one of the following situations.

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