about penalty of income tax

Yes Rs. 1000

no there is no such penalty

if your gross total income itself below taxable limit then there's no late fees but if your taxable income is below taxable limit then there might be late fees

As per 234F of I. T. ACT, penalty is based on total income not on taxable limit.. So if total income is less than Rs 5 lacs then penalty would be Rs. 1000

first of all 234f is not a penalty section, it is late fees section. then it's applicable to persons who are required to file their ITR within time but failed to do so. here the persons who are required to file ITR are persons who have their gross total income in excess of maximum amount not chargeable to tax. so if anyone has gti below maximum amount not chargeable to tax, then they are not the persons required to file ITR within time. so 234f won't applicable to them.
correct me if I'm wrong