Prepare here, publish in Partner Center
Prepare here: store account answers, a local app folder, optional git remote, encrypted credentials, and Microsoft Store listing details — all validated before save.
Publish there: live account signup and app submission in Microsoft Partner Center when your checklists are complete. Copy saved answers from N78-APA into the live store when you are ready to go live.
App Publishing Assistant does not upload your app in V1. See Does N78-APA upload to the store?.