Non-Filling of income tax return - letter from IT Department

Sir, I am a farmer(61 yr old) and have agricultural income, my son is abroad who generally send money to my bank account to support family expenses. Yesterday I received letter from income tax department sub "Non-Filling of income tax return" with details like income tax department has received information on financial transactions/activities relating to you and you do not appear to have filed income tax returns for Assessment years 2014 15. You are requested to furnished response in the compliance module on e filling portal and send acknowledge letter to the office of undersigned within 20 days of receipt of this letter. 1) 2013-14 TDS-194A TDS Return - other interest (section 194A) 2) 2013-14 CIB-183 time deposit of Rs.100000 and more 3) 2013-14 CIB-403 Time deposit exceeding Rs. 200000 with a banking company ------------------------------------------------ As i mentioned my son send money to my account which earn interest income so do i still needs to file for income tax returns? this interest income is not more then my tax slab which is around [deleted] still do i need to file for tax return?