Late return filing

What return ...? ??

income tax of march 2017 or previous

yes you can file till 31 March 2019

No...
We can't file ITR for AY 17-18 in Normal provisions.

In case any refund claim then You can try to Condonation delay request...

No You can't file the return now. Upto Financial Year 2015-16 the return could have been filed Upto One year from the end of Assessment year (which comes up to 31st March 2018).

But The return for Financial year 2016-17 could have been filed maximum Upto 31.03.2018 (as amended by FA 2016).

But yes if there is REFUND or LOSSES TO BE CARRY FORWARD then you can apply for condonation.

No can not file.