To Register a Business with the Montana Secretary of State's Office
Visit the online filing portal at https://biz.sosmt.gov/
Sign into the site with your username and password. (If you don't have an account, simply click the login button and you'll see where you can create one. This is your user profile for the site.)
Go to the Forms section in the left side menu.
Choose the applicable form.
Choose Domestic forms for a Montana business.
Choose Foreign forms for a business formed in another state/country that will be doing business in Montana.
Fill in the form with all required fields, as designated by red asterisks. Scroll down each page of the form to ensure everything required is completed. If pages are missing information, it will be highlighted in red with an “x” on that step; return to that page for edits by clicking on the page name.
Submit the form for processing with the fee (payable by credit/debit card or by e-check.)
The Secretary of State's office will review it, and once approved, will notify by email with instructions to access the approved documents from the portal.