This is just for demonstration purposes:
CJEU - C-311/18 - Schrems II, margin number 31.
"administrative fines up to 20 000 000 EUR, or in the case of an undertaking, up to 4 % of the total worldwide annual turnover of the preceding financial year, whichever is higher.
Common mistake: Because of the territorial scope of the GDPR, the citizenship of a data subject does not matter.
For example: A business might store data for longer for tax reasons. In such a case, data has to be deleted once those legal limits expire.
Article 8, Charter of Fundamental Rights of the European Union