Online Services

Filing Online Saves You Time and Montana Money

We offer a variety of electronic options to meet your needs.

You can use these options to file and pay on your own or to work with your favorite tax preparer or payroll company.

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Learn more about software approval from the IRS.

For Software Providers

Software companies must submit a Letter of Intent for each product they intend to use to file Montana returns. Submit a separate LOI for each product by September 30, 2026.

2026 Letters of Intent:

Access the TransAction Portal (TAP)