There are 3 stages in CA Course.

• Common Proficiency Test: You can register to this stage after clearing Class 10 exam. You can also get the all forms of ICAI from The Institute of Chartered Accountants of India
• After clearing CPT, one has to register for IPCC stage. Application forms are available on the official site.
• One can register for Final Stage of CA course.
• After clearing IPCC, one has get through Articleship with any CA. Here also you have to register yourself as an article assistant with any CA in India.

Hope this helps you overall.

Good Luck.