My client opted out of composition on 31/12/2017 but filed itc 01on 02/02/2018 but input credit in his account is zero. is there any last date for filing ITC 01 for December?
As per CGST RULES 2017 person opting out of composition scheme needs to furnish GST ITC 01 containing details of stock held on the date of filing of intimation with a period of 30 days from the date of intimation.
In your case you have filed intimation on 31/12/2017 last date for filing intimation as per rules 29/01/2018.
i request you to file a grievance with the gst helpdesk or call gst Customer care