Where can I send my feedback? Anja Butenschön May 15, 2023 15:15 Updated Your feedback is very important to us! Please share your experience with us by email at support@taxfix.de. Related articles What does Taxfix have to do with ELSTER? I have questions about my completed tax return with the Expert Service. Who can I contact? Does Taxfix offer tax advice? How much does it cost to use Taxfix? Why can't I upload any documents to my checklist?