As an entrepreneur, you create an invoice with desk4 after the service has been provided or your product has been sold. You can send these to your customer as a printout or as a PDF with desk4. To avoid errors, an invoice should always be created by handing over one or more delivery notes. When the invoice is created, open delivery notes are marked as completed. When the invoice is created, posting-relevant customers and G/L accounts are prepared for DATEV using the customer ID. A credit memo can also be created from this document for a return. Closely linked to the topic of “writing invoices” is also the proper accounting with the transfer of the booking via DATEV to your tax consultant.