For taking SAT Reasoning and SAT subject Tests, it is easy to register Online, as it is very easy to do.
For online registration of SAT Tests, click on : http://www.collegeboard.com/student/testing/sat/reg.html
Student registering for the first time can not register Online. Students can register by mail only. To register by mail, SAT Registration Booklet with Registration Form and Return envelope is required.
The completed registration form must be returned in the envelope provided with proper payment. The SAT Registration Booklet contains test dates, registration deadlines, fees, instructions, test center codes and other registration-related information.
Special circumstances for SAT applicants :
Sunday testing is only available if a candidate cannot test on Saturday due to a religious observance.
Mail registration is available to anyone. Payment can be made by check, money order, or credit card. Standby registration is available if you miss the late registration deadline.
An additional fee applies, and admission to a test center cannot be guaranteed. SAT Test can be applied through Test Centers
Generally, the SAT test centers in India are the cities / places, where the SAT representatives are located.