Invoices, e-invoicing and accounting software in a small business. The articles explain what EU law requires on an invoice, how e-invoicing obligations are spreading across member states, and which invoicing tools are free and what paid plans add. They also cover VAT on sales to other EU countries through the One Stop Shop, invoice data flowing between ERP and an online store, and invoicing as the first process worth automating. For business owners and people starting a business. Start with invoicing software in 2026 — what EU law requires.








