You can register for IELTS test to nearest IELTS test center, which may be a British Council office or other organizations like IDP which is authorized to receive IELTS test applications.

You can find detail on all IELTS test centers at:
http://www.abroadeducation.com.np/test-preparation/ielts/test-centers.php

You can register for the IELTS examination at an IELTS test center. There are 37IELTS test centers around the UK so you should be able to find somewhere close to you. Check this article http://www.adviceforyou.org.uk/blog/ielts/update-the-next-test-date-for-ielts-1st-july-2008/ for the most up-to-date info on up-coming IELTS examination dates and at what IELTS test centers they will take place at.

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