This is talking about AY 2017-18 that means period starting from 1 April 2016 to 31 March 2017.
You have not filed return for the above-mentioned period. In case, your total income during the period was more than 2.5 lacs, you were required to file your return of income.
The last date to file return of is 31 March 2018.
We can help you in filing your return of income.