As mentioned by Brijesh, the YTD is not correctly shown. He joined in September, and the same is not added in the YTD. Please verify the PT amount applicable in West Bengal for this salary range. When he is drawing a salary of Rs. 30,000+ in the payslip, the same will come under INCOME TAX. However, either the current employer has not considered his previous employment income, or there is a mistake in the salary calculation. If the earnings from the previous employer are considered, there should definitely be an INCOME TAX deduction.
Basic salary and other components may vary from company to company, so we cannot come to any definitive conclusion. You can ask for the original appointment letter and verify its correctness. Otherwise, it is difficult to come to any conclusion.
Regards, VGKNAIRVKM