ITR -1 filling

Open Singh (97 Points)

25 May 2019  
one of my friend is a salary person, his income is deducted every year, but he never filled ITR till now. Now he try to filled his ITR from FY 2015-16 online, but on facility is not available but prepared and submit option is available in online income tax filling.

my query is that, from which FY, can he filled the ITR and under what section.

please advise, your advise is very precious