Income Tax (Compliance Notice) – NRI

An NRI has purchased a flat and registered in July 2017.TDS remitted to Seller. It was not let out for rent but occupied  by relative. No income so efiling not done. Now received Tax compliance SMS received. Information culled from 26 AS.It has asked to submit response through compliance portal or file return before 31 03 2019 for FY 2017-2018 AY 2018-2019. My queston is:1.Whether to file or 2. To send response stating that it is not necessary to file Remarks to given Letteable value 1200000 No rent received NRE exempted int 43000/= Income less than 2.5 Lacs and negative if 80C for registration is applied for 1.5lacs. Please inform. Sorry if posted twice since navigation is a bit confusing.