Hello aspirant,

When you are in 2nd puc you have to fill icai registration form it costs around 9000 .

After completion of 2nd puc  you have to write a exam CPT  

If you Qualified in cpt cpt then aftwr you have to clear IPCC (group1 & group 2) after that you have to do article's for one and half year 

Then You have to attempt ca final.

If you qualify CA final 

Then You are  a chartered accountant 

Hope above information is helpful to you

Thank you