The EU Member States were supposed to implement the Quick Fixes into their national legislation on 1 January 2020. Not all EU Member States were able to do so. Attached, you can find an overview we prepared, which links to the country-specific posts on the implementation of the quick fixes.
Overview Implementation Quick Fixes on www.vatupdate.com
The EU Commission also prepared an overview, linking to the national implementation rules. That overview can be found here: