The TOEFL iBT test is administered online and is conducted multiple times round the year at authorized test centers in India. To find available test centers and dates, you will have to create a TOEFL iBT account. When you click "Register for a Test", you will be able to see the available dates and test centers.
You don’t have to register for TOEFL to see available centers and dates, you only need to log into your account. Since you can choose whichever date is convenient for you, you can plan your test preparation for TOEFL accordingly. Be sure of when to start preparing