To update your credit card on file please follow the below steps:
- Log in to the Cloudflare dashboard
- In the top right corner click on your name, and then click on My Settings
- Navigate to the Billing tab, and then click on the "Change Payment Method" tab
- Update your payment method and click "Confirm"
- Note this is also how you would update your company name, or address as well as adding a VAT number.