Table 12 in GSTR1

Further I would  like to add that ,   as per notification  above ,  if  your  turnover less than 5 crore in the  previous  financial  year  then For B2C  transactions  HSN  Code  may  not  necessary  in  Invoice but  not clear that also  in GSTR1 , so as I mentioned  above please confirm  with  Department . 

HSN code is mandatory only in case of b2b transactions.