What is the procedure for applying in a CA after 12th pass?

If you want to do CA after 12th, then you need to register for CA Foundation | CA CPT which you can easily do online or by visiting the nearest CA branch, as you prefer. Then after that you need to appear for the CA Foundation | CA CPT exam which is held in June and December every year. After clearing the CA Foundation | CA CPT exam you need to register for CA Intermediate | CA IPCC which is divided into two groups. You can clear both the groups together or one by one as you wish. Once you clear group 1 of CA Intermediate | CA IPCC, your practical training starts and it continues for 3 years. In the last 6 months you are eligible to appear for the CA Final which is also divided into 2 groups . You can clear them one by one or together. After that you become a CA.