A new window will open. Type in the person's Apple ID and then tap Done
Assuming you would like a step-by-step guide on how to change the ownership of an app in the App Store:
1. Open the App Store app on your iPhone or iPad.
2. Find the app you want to transfer ownership of and tap on it.
3. Scroll down to the bottom of the page and tap on the Developer Website link.
4. Tap on the Contact Us or Support link at the top or bottom of their website (usually depends on which website design they are using).
5) On the contact page, explain that you need to transfer ownership of an app and ask for their help with this process (be polite!). Include your name, email address, Apple ID username (the email address associated with your iTunes/App Store account), and clearly state which app needs its ownership transferred in your message.
6) Wait for a response from them - hopefully they will get back to you relatively quickly! Once they respond, follow any instructions they give you regarding transferring ownership of the app through iTunes Connect (you may need to provide them with additional information such as your iTunes Connect login details).