Key legal question
Whether the taxpayer's request for source-tax rectification filed after 31 March was timely for additional deductions under source-tax law.
Extracted holding
A taxpayer seeking additional source-tax deductions must request rectification by the statutory deadline; the late filing was time-barred.
Extracted reasoning
Unlike an error in rate or barème made by the employer, additional deductions require active action by the taxpayer before the deadline. Allowing a longer period would create unequal treatment versus ordinary taxation and undermine legal certainty.