This section of the JetBrains Marketplace documentation describes the process of publishing a paid plugin to JetBrains Marketplace.
Follow these steps to start selling a plugin
Keep in mind that you can test the plugin on JetBrains Marketplace Demo instance before uploading it. You will be able to go through the whole plugin release process and check how purchasing the plugin works. Moreover, you can make sure the plugin functions as intended and play around with plugin updates. If your plugin contains free functionality, you can test the logic behind licensing checks.