The below Information is from this article:
https://www.euronews.com/my-europe/2024/10/04/brussels-breaks-impasse-after-eu-countries-fail-to-agree-on-chinese-ev-tariffs

The import tax depend on subsidies to the brand and their level of cooperation with the Commission’s investigation:

• Tesla: 7.8%
• BYD: 17%
• Geely: 18.8%
• SAIC: 35.3%

Other EV producers in China that cooperated in the investigation but have not been individually sampled: 20.7%-

This tax will come on top of the existing 10% rate.
The duties will likely enter into force on 31 October and last for at least five years.