1120 Montana electronic filing information

Contact information

Montana Department of Revenue
Phone:
406.444.6900

State electronic filing details

Grace period
10 days
E-filing mandate
No
Accepts state-only filings
Yes
Return types accepted
C Corporation
S Corporation
Consolidated/Combined
Amended
Short-year
Composite (part of main return e-file)
Withholding (part of main return e-file)
Return types not accepted
Estimate Payments
Extension
Direct deposit of refunds
Yes
Accepted forms of payment
Direct debit (EFW)
Electronic funds transfer (EFT)
Check by mail
Signature requirements
None
Supports PDF attachments
Yes
Tax year(s) supported for e-filing
Current tax year and two prior tax years
Special considerations

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