itr last dates and panelty on late filing and non filing

surinder (accountant) (206 Points)

25 March 2019  
i fill my itr as below

a.y.14-15 on time
a.y.15-16 on time
a.y. 16-17 not file
a.y 17-18 not file
(a.y.18-19 on time on 11.06.2018)
income is below 250000 threshhold
tell me the way of the file itr for a.y 16-17 and a.y. 17-18 . if yes i can file than what is panelty ?