50k per month is 6 Lakh per annum. So, I don't think you do. The tax slab is near about 7 Lakh per annum. But still you should file for ITR. It will be good thing.
Income tax don't work as per you're in hand, but it works as per the salary, find your Gross Salary PM or Annual and then check the limit up to 7.50 Lacs your not liable to Tax but need to file ITR as per New Regime and if you opt for old regime then its 5,50,000/- without Tax savings