If your organization possesses the Community status, you can request new Community licenses over at Atlassian: https://www.atlassian.com/software/views/community-license-request.
Note: This request goes for Server, Data Center and Cloud.
Please know that we as a vendor cannot issue new Community licenses, even for our own products. We are happy to help though if you need assistance renewing an existing license.
You can find more information about the Community status in the licensing FAQ.