Reminder received for filing of Income Tax Returns

My Mother (83 Years) filed a return in AY 14-15 since she had refund due to TDS. For AY 15-16 we did not file return since the interest income did not have TDS.
We lived in the apartment that she had settled on her Grand daughters by settlement deed with the caveat that she will enjoy the proceeds in her life time. Now we have moved into a different apartment and that apartment is rented out. This year we need to file return since there is rental income in her account plus TDS. In the mean time we have received a reminder from IT department that we have not filed return for her for AY 15-16. In the earlier returns we have not mentioned the apartment since it was self occupied.
please help out what we should do.
thank you.

 

You should file the return for the A.Y 2015-16 even if there is no TDS. Filing of your return of Income does not depent on your TDS deduction.