MBT - ELF: Best practices for e-file attachments

Alerts and notices

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:

See the Michigan Business Tax Handbook at michigan.gov/taxes for more information.

Internal notes


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