Solution:
Both Mr. X and Mr. Y will be offender and will be liable to penalty as under: Mr. X – Penalty leviable under section 122(3) which may extend to ₹ 25,000/-;
Mr. Y – Penalty leviable under section 122(1), which will be higher of following, namely (i) ₹10,000/- or (ii) 100% of tax evaded.