• Improve code completion and navigation for Python, XML and JavaScript
• Support working with multiple Odoo versions in one project window
• Other improvements to make PyCharm is the best IDE for Odoo

1. Install this plugin from JetBrains Plugins Repository or manually download and install the latest version at here.
2. (Recommended) Clone Odoo Stubs and attach to your project to improve code completion.
3. (Recommended) Install XPathView to improve code completion in XML inheritance views.
4. (Optional) Install PyDev.Debugger plugin for Odoo to improve Odoo debugging.

A sample project structure that supports multiple odoo versions:

https://www.youtube.com/watch?v=SMqepH2A4_4

If the module is installed and configured correctly but you still don't have any autocompletion, it's probably due to Pycharm index caches.

Try running the Invalidate Caches / Restart action, this should rebuild index caches from scratch and hopefully fix the issue.