You have experimented with Google Cloud using your own credit card and expensed the costs...

Grant the financial team the IAM role ofג€Billing Account Userג€ on the billing account linked to your credit card.

Set up BigQuery billing export and grant your financial department IAM access to query the data.

Create a ticket with Google Billing Support to ask them to send the invoice to your company.

Change the billing account of your projects to the billing account of your company.