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One stop shop
From July 2021, B2C sellers dispatching their goods from a single country will no longer be required to register for foreign VAT and complete multiple VAT filings in the countries where they are selling. Instead, they may opt to simply complete and file a new OSS filing alongside their regular domestic VAT return that will list all their pan-EU sales.
This functionality, OSS return is currently not available in Dynamics 365 Finance.
EU 2021 One Stop Shop (OSS) VAT return for e-commerce (avalara.com)