Why were my payments adjusted on the Michigan Business Tax (MBT) return?

If payments you made were not applied to your return, please submit the following documentation to the MBT Correspondence Address along with a copy of the notice of adjustment you received:

• If payment(s) was made by check, furnish a legible copy of the front and back of the cancelled check for each missing payment. Be sure to always include the tax period, tax type, account number and/or assessment number(s) on all checks.
• If payment(s) was made through Michigan Treasury Online (MTO) for Electronic Funds Transfer (EFT) debit payments, inform us of the amount, settlement date, and the confirmation number of the transmission. If the EFT payment was made through your bank, provide the amount, settlement date and the bank account number and routing number where the payment was sent from.
  • See About Business Taxes Electronic Funds Transfer (EFT) Payments for Debit Block Identification/Company ID Number information.

If payment needs to be submitted to the MBT Unit (i.e., if an Intent to Assess or Final Assessment has not yet been issued), mail payment to:

Michigan Department of Treasury
P.O. Box 30113
Lansing, MI 48909

• Be sure to always include the tax period, tax type and account number on all payments.

If payment needs to be submitted to the Office of Collections (i.e., if an Intent to Assess or Final Assessment has been issued),  mail payment to:

Michigan Department of Treasury
Office of Collections
P.O. Box 30199
Lansing, MI 48909

• Be sure to always include the tax period, tax type, account number and/or assessment number(s) on all payments.

If you have an assessment with the Office of Collections and would like to make a payment electronically, please visit michigan.gov/collectionseservice