Tax refund of joining bonus with non-revised Form-16

Hi All,

I joined a company in August, 2023 and was given a joining bonus of 3,75,000 and after tax deduction I received amount of 2,58,000. I have decided to leave that company and according to offer letter, I am obligated to return INR 3,75,000 joining bonus. When I asked my employer to mention this transaction in Form-16 to reduce my gross taxable income, They denied, saying that it is company's policy, All they can can do is mention this transaction as 'Repayment of joining bonus' in my payslip.

My Form-26AS reflects the TDS that employer has paid.

Please HELP!!

How can I claim this tax?

Thank you!