1 Answers
Below is an official description of Billing Account User
from GCP:
This role has very restricted permissions, so you can grant it broadly, typically in combination with Project Creator. These two roles allow a user to create new projects linked to the billing account on which the role is granted.
You can read more at Overview of Cloud Billing access control.
So basically, you need to make your user able to access and modify the billing of project, i.e., your user account must have enough permission on the project itself. If only the role Billing Account User
is assigned and nothing else, that is not enough to configure the billing for a project.
"My Projects" tab disappeared from " Billing Account Manage" page, you have to search "Billing Projects" from the search box on the top to bring it up.