Class11th students cannnot be eligible to fill CPt Exam Form. 

Students need to fill CPt application form online by registering online on ICAI website which then shall give you credentials to login to applications form.

Students need to enter exam centre preferences and mode of exam and pay fees online and submit before 1st Week November 2018 tentatively. 

Candidates must have passed 12th pr must be appearing for 12th.

Entire process sjared below. 

https://finance.careers360.com/articles/ca-cpt-application-form