Seeking the information

Til today,we all try to figure out as more information as we can for our project,but just little information we got that different society people pay the different tax and people from different countries also pay the different tax. But we can't make sure about it even we seached on line or from the project descriptions.
 Therefore we made a testing in our school and some  neighbour international schools like KEA,we prepared the questions belowing:

• Where do you come from?
• Do you have a job in Denmark?
• How much you earn per month?
• How much you pay the tax permonth /year?
• You think it is the high or low tax for you?
• You know something about the  tax system for international student in Denmark or not? Such as?
• What is your own opinion about the danish tax system ?

The result we got is that most of international students have the part time job but don't know so much about the tax payment ,or why they payed different in some months even they got the same salary as normal.And little of them also argue that they pay so much tax per month to tax office.
What is more ,we found the situatons that many EU students pay the same tax as none-EU students,but the different tax between the different none-EU countries students in Denmark.
Thus we tried to get the answer for our supervisor,we hope we can get the detail info about it.
then we can stat our project concepts as soon as possible!!!