If you decided to perform foreign services in Denmark, first of all your company must be registered in the Register for Foreign Service Providers (RUT). According Danish Business Authority „If you have a foreign company, you must report information about:
Note, paper forms is not accepted, all procedure must be done digitally on Virk Rut. If you want to, or must start a business in Denmark, you will need to follow all the Danish rules for temporary business in Denmark and for a start a permanent business in Denmark. First of all, we will represent for you a summary of rules for temporary business in Denmark:
Source: Danish Business Authority – https://danishbusinessauthority.dk/ .