Help

Follow this link

https://www.icai.org/post.html?post_id=3920&c_id=275

It contains all details regarding ATC course and combined fee for ATC/IPCC.  IF link dont work then log on to the site of ICAI, there you will find details of ATC under "Student" head.

In form no option is given for ATC, now what should I do?

In that case you can apply seperately for IPCC & ATC courses.  Fill 2 forms - one for conversion from pcc to ipcc and second for atc.  In form given below you can opt for atc seperately or jointly with ipcc.  in case of doubt contact your local ICAI branch or talk directly with ICAI head office delhi

https://www.icai.org/resource_file/14263ipcc_regform.pdf