Unfair New Practice

Till last year, in Schedule OS, Sl. No. 10, the quarterly breakup of Dividend Income should be entered compulsorily. This year, this has been made optional, and the system assumes that the entire amount is under "Upto 15/6". If a tax payer forgets to fill the breakup, without any warning the system increases the Interest under 234C. This is unfair. Other than their Grievance mechanism, is there a better forum to raise this? Thanks.