Documents issued coloumn number

Ajnas (Student) (844 Points)

11 August 2021  
query 1:-document number for invoice, credit note and debit note relating to the june 2021 is not declared in the june 2021 GSTR 1 "table 13 document issued coloumn", but sales, debut note and credit note is correctly declared in the june 2021 GSTR 1,then we can declare such missing document issued number in july 2021 GSTR1 table 13 document issued coloumn"?
2.document issued coloumn is mandatory to declare?