Guides for selling online

These guides for selling online cover the questions merchants in Portugal and Europe actually ask: how to start, how VAT works across borders, what platforms really cost and when to move. They are written to be useful whatever platform you choose, and each one links the official sources it relies on.

• EU VAT and OSSEU VAT for online sellers in plain words: distance sales, the €10,000 threshold, whose rate to charge, and how the VAT OSS return works, with an example.
• Magento 2 end of lifeMagento 2 end of life, release by release: Adobe's support dates for 2.4.4 to 2.4.9, what end of support means for PHP and PCI, and how to choose a next step.
• Shopify fees explainedShopify fees as of October 2026: plan prices, Shopify Payments card rates, the third-party transaction fee, apps and extras, with three worked examples.
• Start an online storeHow to start an online store in Portugal and Europe, step by step: registering, payments, VAT, invoices, shipping, returns, platforms and what it all costs.