you do not have to show any purchase in return do not have to show any sale in return
only registered RCM like freight (columb 4B B2B )and unregistered purchase(column 4C B2BUR) you have to show in return CREDIT AND Debit note unregisterd and registered you have to show in return
go to gstr 4 initiate filing do not use tool for nil return after inititae filing save your turnover then submit your return go to column 10,11 you can see your late fee there its automatically deducted and then you file your return ..
first confirm that how much late fee shown there you have to pay your late fee then file