Harish, I am not sure about two these things but they are likely.
1. First of all, you need to enrol for the final course if you had not done it earlier after you cleared your intermediate.
2. Secondly, if you have never appeared for your final exam than probably you need to write test papers.
But if you had already enrolled for final course after you cleared inter and if you had already appeared for final even once than all you have to do is start preparing for exams and fill up the examination form. Please see that you will need to mention your roll no. of your final examination appearance in this case.