> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.sosmt.gov/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Change Principal Mailing Address

1. Visit the online filing portal at [https://biz.sosmt.gov/](https://biz.sosmt.gov/)
2. Sign in to 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.)
3. Search for the business by name or folder ID.
4. In search results, click on the business name to open the record.
5. In the slide-out bar on the right, click on Filing Actions.
6. Scroll down to select and complete the “Principal Office Address Change” form.