ITC 01

Nandkishore (Student CA final) (48 Points)

01 June 2018  
a composition dealer converted himself as Regular.
date of conversion 80 .4.2018 but he did not filed GST ITC 01 within one month.
can he file after due date of filing.?
if yes..then from which date and upto which date stock information can be considered.
kindly suggest....Thanks.