In the client file, Profile tab, Billing information block, choose one of these options:

  • Invoice data matches the client file: the invoice uses the client's own details.
  • Other details: enter the company name, tax ID and full address.
  • This client's invoices are billed to another client: for example, a minor whose classes are paid for by a parent.

With the last option you can also tick Include this client's details in the line items, so it's clear who the invoice is for.