If you have a legitimate need for the software but cannot find the link, the automated support system can generate direct download links for legacy software installers. Go to the main Autodesk Support page.

When you first launch Revit 2020, you will be prompted to sign in with your Autodesk account. Choose the option to run the software as a trial. Your 30-day trial begins the first time you launch the software , not at the moment of download. If you are not asked to enter a payment method, the trial will expire automatically after 30 days.