Usually, students should submit relevant forms of articleship (Forms 102, 103) within 30 days of joining the ca firm. You joined in August 2010, I dont know why you still not submitted the forms till now. Its one year late. Usually there is no due date for registering the articleship, but once you join any firm, within 30 days you have to forward the Forms to ICAI. In my view, as you have not submitted your articleship forms to icai, your final will be due during last 6 months of articleship. Hope you have done your final course registration. Let others too comment.