The National Tax Service (NTS) of Korea has published the annual 2020 "Easy Guide for Foreigners' Year-end Tax Settlement" providing information on changes to the tax laws to enhance the convenience of foreign employees and their withholding agent (local Korean employers).
This year of 2020, the book contains information on tax laws related to year-end tax settlement, mandatory and personal deductions, benefits, tax credit, frequently asked questions on year-end tax settlement, calculation examples, tax forms, and how to use the simplified year-end tax settlement service, etc.
The guide contains 225 pages and is written in Korean and English in order to help the communication with the local Korean employer who will usually prefer to read the rules and regulations in the local language.
The tax guide can be downloaded from here: Easy Guide for Foreigners' Year-end Tax Settlement (PDF, 3.7M)
If you are foreign employees working in Korea, please be aware that the NTS operates various services for foreign taxpayers such as “Help-desk for Foreign Taxpayers” at all NTS district offices, “Help-line for Foreigners (☎1588-0560),” and the NTS English website - https://www.nts.go.kr/english/main.do