Hello Ruby,
To change the GCP Billing Account of an existing Dataprep subscription, you can follow these steps:
It's important to note that only users with the Billing Account Administrator role can change the billing account for a project.
Also, please note that changing the billing account for a project will affect all the services and resources associated with that project, and it may cause service interruption. It is important to make sure that you have the necessary permissions and resources to change the billing account.
Thank you,
Marni Monika