There is a growing population of foreign workers here. The National Tax Service, estimated that the number of non-Korean taxpayers surpassed 500,000 in 2012. (That’s a significant increase from 403,000 in 2010 and 465,000 in 2011!) Foreigners must file for their year-end tax settlements, but NTS provides a set of guidelines you can follow. Foreign residents must submit tax forms on the same day as Korean citizens, but tax treatments differ slightly….