You can file the Montana Disregarded Entity (Form DER-1) tax return electronically in the Montana TransAction Portal (TAP).
You need a TAP account to file the return.
If you do not have a TAP account, sign up for one with
- Your 13-digit Montana Account ID and
- Your five-digit ZIP code.
Your Montana Account ID can be found on any correspondence you may have received from the department.
Contact us if you need your Montana Account ID or for any help with your TAP account.
Learn more about disregarded entities, including due dates and extensions.
Learn more about setting up your TAP Account.