Trafik-, Bygge- og Boligstyrelsen is the Danish Civil Aviation Authority. Normally reporting is to be done via aviationreporting.eu, but temporarely you can also use this form to report incidents according to 376/2014 by uploading a filled out pdf form.
Pdf-forms can be downloaded here link
Instructions: Save the pdf form to your device, Fill out the pdf-form and save it. Uoload the pdf form below.