Inputs credit

Hi, we have filed our gstr3b return Upto Mar 18 as per bills received, but Thier might be more input credit will show in our GSTR2 eg bank charges, airlines GST credit etc, against which we will never receive any bill copy in future, then how can we take credit for those cenvat if GSTR2 will not happen, can we take that leftover cenvat in our annual GST return and can change necessary changes into our books, kindly advice, Thanks