Hi,

All that is needed to do any action relating to your membership with ICAI, first thing is you must login to the SSP, Self Servicing Portal of ICAI, by creating login and password, and submit relevant form there, perhaps you would be asked to submit a declaration for surrendering the COP, once procedural requirements are completed you would get an acknowledgement mail, and soon after your request is processed, you get another mail confirming the surrender by ICAI,

Voila, its simple provided you complete all the checks and balances of the SSP Portal,

still if you need help reach out to Regional Council office and get more information from them.