Michigan Business Tax
E01. Will I be able to send attachments with the MBT e-file return?
Yes. Treasury will accept certain Portable Document Format (PDF) attachments with MBT e-filed returns. A list of defined attachments is available on the e-file Web site at www.MIfastfile.org (select Business Taxpayer). You will need to follow your software instructions for submitting attachments with an e-filed return.