Load EU tax rates from https://github.com/yireo/Magento_EU_Tax_Rates
This library offers a client to load EU tax rates via a feed, including parsing and caching:
use Yireo\MagentoEuVatRates\Rates; $rates = (new MagentoRates)->getRatesTable();
To install this library, use composer:
composer require yireo/magento-eu-vat-rates-library
This library ships with some unit tests. However, these tests rely on an internal Yireo library to validate actual rates.