Siemens does not offer a specific "2020 Community Edition." The current Community Edition is for newer versions. However, if you find a legacy link from 2020:
A free version is available for academic use. You can access these resources on the Solid Edge site or download the Siemens student edition directly. solid edge 2020 download
The safest and most reliable way to obtain Solid Edge 2020 is through official Siemens channels. Depending on your user type, the download path varies: Siemens does not offer a specific "2020 Community Edition