Taxman
Find out if the ATO has an agreement with Korea and if you will be paying tax in Korea if yes to both then you will have to pay for your medicare levy here in oz...You can find out if Korea has an agreement with Oz by going onto the ATO website...if they don't have an agreement then chances are you will have to pay tax here...you can thank K Rudd for that one...also ring the ATO and tell them your details and they will help although when I did they were still working through the new rules and were confused themselves...they should have their story straight by now though????
Where I work I am taxed at a higher rate than in Oz so all I pay is the medicare levy...as my accountant says if it were a true agreement by rights I should get tax back.