If you are being transferred to Seoul, the Human Resources department of your company should be able to refer you to a reliable tax advisor or accountant. There are plenty in Seoul, however, and if you find yourself in need of assistance you can try these English speaking accountants:
- Daehyun Accounting Corporation: http://daehyuncpas2.golden21.net/
- Dongnam Accounting Corporation: http://www.alliottkorea.net/
- Easi Accounting Corporation: http://www.ezac.co.kr/
If you want information about filing your taxes in Seoul, you can always contact the National Tax Service (http://www.nts.go.kr/eng/index.asp) or call their hotline, where service is available in 18 different languages. You can call during office hours at 397-1440 or after hours at 1588-0560. The National Tax Service has knowledgeable staff who are trained to help you and answer any questions concerning taxation you may have. They are also able to walk you through the process of filing your own taxes and have PDF files explaining how to file your taxes and answering frequently asked questions.
Also, the Seoul Global Center has volunteer accountants and lawyers available a few days a week to answer any legal or tax related questions you may have.