Fir registered on myself is possible to remove from police online portal

Sir on myself a criminal case was filed on 2017 and on 2019 itself I got acquittal from court not convicted or not sentenced absolutely free from it. At now I had cleared Tamilnadu government preliminary exams and admitted for mains exams wrote well waiting for result in November. Once fir registered even though we got acquittal we should mention in application form I don't know. Whether during police verification they gave any adverse report or they specify yes there was fir. Problem is I didn't mention there is fir on myself. I had enquired tnpsc toll free no while during application u should specify or else u will be rejected they saying. How can i clear my record as a common man what should I do. For result and verification a gap of six months there I was not convicted so it's no problem right sir then how I remove my name from criminal antecedent. Or else even though fir we have Whether police give good report if acquitted pls help how to remove my name from online portal. Or else give your suggestions sir.