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 the company name and address of my company? How do I change my company's tax/national ID? Who can change company information? Can I administer several companies ? What is the "Additional Information" section of the "Companies" tab for? I can't view the "Additional Information" tab When registering, what does the electronic ID correspond to?

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 to create a group of companies? How do I edit a group ? Can I delete a group ?