Most Android apps we provide are hosted in our Innovatise Google Developer account to keep things simple for you. If you want to offer In-App-Purchase for content in your app, we'll need to transfer your app from our account to a Google Developer account you control. This ensures that you get the money and reporting on In-App-Purchases.
The steps you need to take are:
Create a Google Developer account if you don't already have one
Allow Innovatise to access your Google Developer account so that Innovatise can keep your app update
Set up banking on your Google Play Console
Configure the In-App-Purchase settings on your Google Play Console