Tax on Income from Interest on saving bank account

Employer wont know the amount of interest credited to your account. On his part he is obliged to only disclose the amount paid by him to you. Hence he wont be aware of the interest and is generally not disclosed. there is no benefit on not showing BAnk interest as it is anyway a meagre amount . Deduction was available earlier under 80C. But it is no longer available now.

I don't agree that S/b Bank Interest is a meagre amount (Excepting few cases).

Yes, Employer is not under obligation to shown your Bank interests in Form 16, But if you disclose the same to your employer he can add the same to your Income.

Bank Interest is Taxable and should be shown while filing IT Returns under income from Other sources.

Earlier Bank Interest was qualified for deduction u/s 80L

Yes under the head "I.F.O.S"

Return of income to be filed by different assesses in differ