how can I find if my itunes has the latest version on my pc

Like this:

Update to the latest version of iTunes – Apple Support

If you downloaded iTunes from the Microsoft Store

Versions of iTunes from the Microsoft Store update automatically when new versions are released.

You can also check for updates through the Microsoft Store.

If you downloaded iTunes from Apple’s website

1. Open iTunes.
2. From the menu bar at the top of the iTunes window, choose Help > Check for Updates.
3. Follow the prompts to install the latest version.

If Check for Updates isn’t an option in the Help menu, you downloaded iTunes from the Microsoft Store.

Good luck!