http://www.seab.gov.sg/SEAB/eservices/iERS/Registration.html
The GCE N, O and A-Level registration period is 13 calendar days (including Sunday), starting on 8 March 2010 until 11:59 pm on 20 March 2010.
The estimated time required to complete the application is about 15 minutes.
You need the following information before registering online:
Candidates' NRIC
Candidates' Foreign Identification No or Passport
Subjects/ Papers to be registered, including the Subject Group and Subject Code
Candidates are able to view their registration details from 8 March to 3 April 2010 . Payment must be made through any SingPost office or S.A.M between 27 March and 3 April 2010 .
During the registration period, private candidates can make amendments to their subject/paper entries without any amendment charges.
After the registration period, amendment requests have to be made to SEAB through either email ( [email protected] ) or posted mail (to 298, Jalan Bukit Ho Swee, Singapore 169565). Candidates have to clear all outstanding payments prior to making any amendments. An amendment fee of S$20.00 (in addition to the subject fee) will be charged for each amendment request made after the registration period, i.e. 20 March 2010 onwards.
For clarification, please contact the Ministry of Education, Customer Service Hotline at 6872 2220.