As you have given your examination of class 12 so you are eligible to give CA Foundation exam.CA Foundation is conducted 2 times in a year that is in may and in November.The CA Foundation form will be released by ICAI in may- June and the coaching classes will probably begin from July.The coaching fee will vary from 30000-40000. For the preparation of CA Foundation it will nearly take 4 months . During this 4 month you have to be very hardworking and dedicated towards your studies as CA is a very tuff professional degree course .The exam form will be of nearly 10000-12000INR. After filling the form you will have to place order for your books which will be delivered to your doorsteps.One month before the exam you have to fill the exam form after which you will be eligible for the exam.The registration for CA Foundation is valid for 3 years .Hope this answers your question.

Dear student A person can register for CPT after completing Grade 10 and take the exam after completing High School (Grade 12) and complete graduation for commerce.
It is an objective type examination and consists of 200 multiple choice questions. CPT covers four basic subjects divided into two sections viz.

1.accounting(60 Marks) +mercantile law(40 Marks)

2.Economics (50 Marks) + Quantitative aptitude(50 Marks)

Every incorrect answer on the CPT exam carries a 0.25 negative mark. A candidate is required to secure a minimum of 30 per cent marks in each Section and a minimum of 50 per cent marks in aggregate, in all the four Sections to pass the Common Proficiency Test.
CPT 2019 Application Process.
An application for admission to Common Proficiency Test (CPT) is required to apply online at https://icaiexam.icai.org from 04th April2019to 24th April2019(without latefees) and upto 02d May2019(with LateFeesof Rs.600/- for Indian & Kathmandu Centres and $10 for Foreign Centres).
Thank you..