You have a problem for Italy with sales invoices that have 0.00 amount.
The system does not allow to post the accounting document as there is not tax line, as the VAT register expects a tax line.
SAP S/4HANA Cloud
In this case, to overcome the problem, it is suggested to post it with 01 cent invoice, instead of 00, so the posting occurs using W1 doc type.
This is a workaround to customers in case you need to issue 100% discount invoices.
Document and Reporting Compliance, eDocument, Italy, sales invoice, VAT, tax, W1, discount. , KBA , CA-GTF-CSC-EDO-IT , Document Compliance Italy , Problem