To update the billing and company information, navigate to My Account > Company Information:

 My Account > Company Information

On that page, you can update the following details:

Update Company and Billing information   
  • Company Information: company name and address. You can also check the Billing address is the same as the company address box to automatically fill in the Billing Address
  • Billing Address: the address to which bills/invoices are sent
  •  Billing Information: the payment method (credit card or invoicing) and the card/invoicing details