Also any kind of invoice data is by law (in Denmark) required to be kept for 5 full years after closing of the books. That also means you are not allowed to del

Also any kind of invoice data is by law (in Denmark) required to be kept for 5 full years after closing of the books. That also means you are not allowed to delete that data in that period due to the GDPR (as the accounting law overrules the other)