Along with your W-2 state filing, Montana mandates the filing of the Annual Withholding Tax Reconciliation Form MW-3 to be submitted.
|Filing Type||Due Date|
|Electronic Filing||January 31|
You must file the form W-2 even if there was no state withholding.
Be sure to file the Annual Withholding Tax Reconciliation Form MW-3 directly with the state.
The state of Montana accepts both e-filing and paper filing.