How do I set up a shipping address for my invoices? How do I send my invoice by email? How do I send an invoice or credit note to my customer? Can I follow the processing steps of an invoice once it is uploaded on the portal? What are the possible ways to send an invoice? How will I be informed that SY has taken charge of my invoice? I uploaded to the portal or sent by email an invoice. What if it does not appear on the portal? If I don't have an invoicing tool, can I use the portal to enter an invoice? Can I upload several files? Can I see all the processing events for my invoices? How am I notified that my invoice is rejected? When submitting invoices, what is the "Reference" field? Is an invoice sent by email immediately visible on SY? When uploading an invoice, should the value of the "reference" field be unique? Is a submitted invoice immediately visible on SY? Can I send several invoices by email at the same time? My client allows me to send invoices by email or to enter or upload them on the portal. Do I have to choose? Why do I have to identify the issuing company when I’m filing or entering an invoice? Why have I received an email with the Subject “Issuing establishment cannot be identified"? How are the order and contract numbers checked? How many tax rates can I enter?