Many nomads know they need provable, recurring income for D7/D8, but struggle with where and how to legally register, invoice, and document it in Portugal. This episode gives a compact, practical walkthrough of registering as an autónomo (or choosing the right small-business alternative), issuing recibos factos/receipts that SEF accepts, and simple bookkeeping habits that turn day-to-day client work into airtight residency evidence. I unpack the required documents, realistic timelines, common pitfalls that cause SEF or tax headaches, and a repeatable invoicing routine that supports energy, grooming, and professional communication during client interactions. You’ll finish with a clear, safe 3-step blueprint to start invoicing this week, plus a one-page checklist to keep your paperwork audit-ready and your lifestyle optimized for long-term success in Portugal.