How do I add or manage a billing address?

Click your avatar (top right) → Subscription Plans, then switch to the Billing Address tab next to Subscriptions. Until you add one, you'll see No billing addresses yet.

Click Add Your First Address to open a form with two sections: Contact Information (First Name, Last Name, and Billing Email are required; Company Name is optional) and Address Information (Country, Street Address, City, and ZIP/Postal Code are required; Apt/Suite and State/Province are optional). This address is used for your invoices, receipts, and subscription payments — you'll need at least one saved before you can purchase credits or subscribe to a plan.