I have an error "the sender's email address is already in use" when I set the email address for sending invoices. How do I update my company information ? Can I change my company's name or address? Can I change my company's national or tax ID? Who can update my company information? Can I administer several companies ? What is the "Additional information” tab for? I can't view the "Additional Information" tab What is the company's electronic ID?

What is an “establishment” and what is it used for? When creating a facility, what is its ID ? Can I edit a facility ? Can I delete a facility ?

What is a group and what is it used for ? How do I create a group ? How do I edit a group ? Can I delete a group ?