In under 3 minutes you'll learn how to form an LLC in Montana. br Download our Free iPhone App: br Visit our informative page: br br We walk you through the steps needed to open your LLC. br br Before forming your LLC you'll need to chose a name and registered agent. Then you must file the articles of operation (instructions available on our website). Learn whether you need an operating agreement, how to apply for an EIN, and what you need to register for to be compliant. br br Once you start your limited liability company, you'll need additional resources.