When can i start Practicing CA

once u complete your CA along with gmcs 

you need to fill a form for membership 

if you are opting to do practice you need COP

SO u need to fill membership form wid a draft of Rs 4000 for COP

Once u get it ... u can start practice ...

by the way i wish to know are u going into practice ?  i wish to ask more questions from u as well.. if u are