KnowledgeBase is linked to your LiveChat account, so your billing details are shared between both accounts. Any time you are charged with KnowledgeBase subscription you’ll be emailed the invoice for that payment, just like paying for LiveChat. That said, all payment settings like billing info, invoices list are managed within LiveChat application. If you want to update the billing details, visit the "Update billing info" section and follow the below steps.

KnowledgeBase is integrated with the LiveChat billing system, so all billing details and payment methods are shared between your both accounts. Thanks to this integration, subscribing to Knowledge Base comes down to roughly two clicks. Upgrading your account To subscribe to Smart KnowledgeBase, all you need is a few minutes and an active LiveChat account (or a credit card). To set up or renew your KnowledgeBase subscription, go to the Billing section in KnowledgeBase app and hit “Upgrade my plan” (don't worry, it won't start your subscription, yet).