CL300:
Just keep it simple. I know this for a fact. Theres no arguing about it; Norway and Sweden. IF you work for international company and tax your income to another country that Norway and Sweden has a tax agreement with there is NO DOUBLE TAXES !!! I dont know how the status is in Denmark. And yes, this information is konfirmed to me from pilots that lives in these countrys and thats uses a tax agent to do their taxes. In addition to be on the safe side, I contacted both the Norwegian and Swedish tax athorities and they send me a list of countrys that has signed the double tax agreement.
So CL300, why dont you contact the respective tax athority in these countrys and get the answer from them, since you obviously cant understand what Im writing here.