Next SAT administration will be held on January 22 at CSIA. The first 100 seats have already been filled. 75 more positions have been opened for CSIA students only. To access them you must put in the testing center as CSIA 65198 and your school as CSIA 682029.
The deadline is December 23 for registration. Remember in Korea there are no changes allowed after that, so be sure to carefully decide what you want to do and make the appropriate registrations before that. There are no standbys, no test changes, no test center changes, no date changes.
There are no other SAT administration dates until May unless you travel to the United States in March. In the USA in March, only the Reasoning test, SAT I is given. No subject tests, SAT II, are offered.