MBT - ELF: Best practices for e-file attachments

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Change to CS Support service hours

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.

The state of Michigan accepts PDF attachments with MBT e-filed returns. Due to state requirements, attachments to the MBT e-file must meet very specific naming conventions. As a result, UltraTax/MBT uses the following conventions:

For more detailed information regarding the naming convention of e-file attachments, refer to the Michigan Tax Preparer Handbook for Alternative Filing Programs available from the Michigan Treasury Department’s website.

Internal notes

Support: The following forms will be automatically attached to UBG efiles: The 4700, 4746, any affilate forms (beginning ith "u"), and the 4581 (it's non-calculating, and must have data)

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