Deploying an app under a different team name

Hi All

Just looking for some guidance/tricks/tips and gotchas! for the following scenario:

I have developed an app which has been tested through TestFlight under my account. Recent changes in our family circumstances make it more beneficial tax wise to deploy the app under my partners name. I have created a dev account for my partner.

Is it as simple as adding my partners account to my Team list in xcode and reuploading the app…?..or do I have to create a new project under her account and submit the app?

Any advice or guidance appreciated…

Thanks
Brett