An Invoice Is the Result of a Process.
Customer information, an item reference, VAT, or payment terms can originate from different tools. The reform makes this flow more visible, but it does not create the problem: it reveals it.
The Practical Task
Mapping sources, designating the authoritative system, and identifying manual re-entries provide a solid foundation. Excel can help analyze the current state; the goal is then to avoid redundant data entry.
To learn more. Official Electronic Invoicing Schedule