If you need to update your credit card information, you can do so through the billing dashboard. Head to https://app.stackdriver.com/settings/billing or click Account in the top right corner of the screen and Billing from the left menu (note: you must have administrator privileges to access the billing dashboard).
1. Under Payment Methods, click Add Credit Card
2. Add your credit card information and click Save
3. Once completed, you will return to the billing dashboard. Under Payment Methods, locate your newly added credit card and select Make Default
Please contact support if you need to remove a card.