You can take the test in Ankara, Istanbul and Izmir.
IELTS test dates can be found at http://www.britishcouncil.org/turkey-learning-exams-ielts-dates

Exam venues are announced to your email address stated on your application form, 3 days before the exam date.

In order to have £110 of IELTS Examination fee transferred safely, please make sure that you have all the bank details stated below.
Please note that you are responsible for all the extra transfer and exchange fees. Therefore, payments less than £110 will not be accepted.
In order to have your application accepted, you have to call +90 212 355 5657 and confirm your payment. The Exams Department Istanbul has all the rights to refuse your application if the procedures are not followed as stated above.

Turkey £ Account
Is Bankasi
Beyoglu Subesi
Branch Code: 1011
Account No: 3150992
Swift Code: ISBKTRIS
IBAN CODE: TR160006400000210113150992

Test report forms are mailed to candidates on the 13th day after the test in sealed envelopes via a courier company. Details of results cannot be declared over the telephone, fax or e-mail.
You will receive only one copy of your test report form (TRF). Original test report forms can be sent to the institutions of your choice for a fee of £2.00 per copy, plus postage. You need to deposit £2 plus postage fee to the British Council Bank Account:

Turkiye İs Bankası Beyoglu Branch
£ (Sterling) Account Number: 1011 – 3150992
Include on the bank deposit slip: first name, last name, telephone number, IELTS Examination date and the delivery address. Fax the photocopy of the deposit slip to our Exams department Istanbul on: 0212 355 5659.

Results are valid for two years. It is not possible to print Test Result Forms older than 2 years.