As a Dynamics 365 Business Central user in a Microsoft Partner Supported Country, you may wish to install the Jet Reports Financials extension to your Business Central tenant. In these countries, users must follow these instructions in order to install an extension from AppSource.
Login to your Business Central tenant and notice the URL in the address bar of your browser:
Modify that URL by appending the following to it:
Once you have added that additional information to the URL and pressed Enter, the installation process will be started.