How do I handle EU VAT OSS in Magento for an Irish store?

The One-Stop Shop (OSS) scheme lets Irish merchants collect VAT for all 27 EU countries through one Irish-based registration with Revenue.ie, no need to register in 27 places. Magento setup:

• Tax zones: one per EU member state with destination-country VAT rates (DE 19%, FR 20%, NL 21%, etc.).
• Threshold logic: below €10,000 cross-border B2C/year you may charge Irish 23%; above, you must charge destination-country VAT.
• OSS quarterly return: Magento exports a quarterly VAT-by-country CSV for Revenue.ie filing.
• IOSS for < €150 imports from outside EU, collect VAT at checkout, file via IOSS.

We integrate Stripe Tax or Avalara for auto-calculation across all 27 destinations and the OSS / IOSS export.