Using the billing platform
Your account's billing settings apply to every paid feature or product you add to the account. You can manage settings like your payment method, billing cycle, and billing email. You can also view billing information such as your subscription, billing date, payment history, and past receipts.
About billing for your enterprise
You can view billing information for your enterprise account on GitHub.com.
Adding a sales tax certificate
If you're a customer in the United States with a GitHub Customer Agreement and you're exempt from sales tax, you can upload a certificate to ensure the correct sales tax amount is calculated.