Approved Software Vendors

We test software to ensure we can accept forms filed by the software. The software vendors below are separated by tax type.

Vendors may be approved for one tax type but not another.

We only test software to ensure we can accept forms filed by the software. We are not associated with vendors and cannot guarantee any aspect of the software.

Learn more about software approval from the IRS.

If you need assistance with one of our online services, please email us at DORCustomerAssistance@mt.gov.