Gstr 9 credit note query

in my books data 2017-18

purchase   sgst- 52400, cgst-52400  :  purchase return  sgst-1200, cgst-1200

so my actual input tax=51200+51200

this return not less in 3b (2017-18)

so that return  reversed during 2018-19  

in my annual return 2017-18    TABLE 6A  showing    52400+52400

and 

and that   amount 1200+1200   also recorded in TABLE 12 of itc reversal

my question is which amount to enter in table 6b of annual return??

can i enter actual  input, ie-51200+51200   or  itc availed input 52400