eligibility for ATC certificate?????????

I think completion of articleship is also required. Check th link for further information -

https://www.icai.org/new_post.html?post_id=3748&c_id=121

A candidate may opt for Accounting Technician Course. Such a candidate has to undergo a study course of nine months, 35 hours Orientation Programme and 100 hours Information Technology Training before appearing in Accounting Technician Examination (ATE). It is to be noted that Group I of IPCC is equivalent to ATC. After passing ATE, he will also be required to complete 12 months of work experience and on production of a certificate to this effect he will be issued Accounting Technician Certificate. A candidate who does not wish to complete erstwhile Intermediate/PE-II/PCC/IPCC can opt for ATC.