1120 - CA ELF: ELF Critical Diagnostic - A California corporation number is required for electronic filing

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Our Support department is closed on [[date]]. However, limited UltraTax CS phone support is available on that date from 9 AM - 5 PM ET due to the approaching deadline.

Links to our most popular tax processing topics are available in the Alerts and notices section on the right side of most pages.

Enter the California corporation number on California Screen Gen, located under the General folder.

Per the Form 100S instructions California corporation number is a new requirements this year for e-filing. Corporations can still report the SOS number but must also have a corporation number.

Note: Access Form instruction via a link to the IRS website using this procedure:

  1. While on any Input or Form within a UltraTax CS client, right-click on any visible area on the current Input screen or Form.
  2. From the context menu which appears, highlight the subcategory for Web Research, followed by highlighting the Government subcategory found within.

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