As per the latest update, in ANY of following cases return filing becomes MANDATORY:
If Gross Total Income (GTI) exceeds Rs. 2,50,000. However, For Senior Citizens (age 60 or more), Rs. 3 Lacs AND for Super Senior citizen (age 80 or more), Rs. 5 Lacs shall be seen.
Business Turnover Exceeds Rs. 60 Lacs
Professional Receipts Exceeds Rs. 10 Lacs
Total TDS and/or TCS Amount is Rs. 25,000 or more
Total deposits in one or more saving accounts are Rs. 50 lacs or more
Total deposits in one or more Current account is Rs. 1 Crore more
Total Foreign Travel Expenses during the year exceeds Rs. 2 Lacs
Total Electricity Expenses during the year exceeds Rs. 1 Lacs
NOTE: In some other case, Like Income Tax Refund claim, Carry forward of losses, to apply for Bank Loan or VISA, return filing becomes necessary.