GST PURCHASE BILL MONTH DIFFERENCE

april 

You are eligible to take the input credit in Apr-18

sir,

A person holding gst number , but not filed return from last december, he closed the business already, but not cancel gst number unitl now. he dont have the purchase bills also he misplaced somewhere, now he wants to cancel now the gst. How get the purchase details ?

Can I take from  GSTR 2A?