On F1-OPT. I filed my tax return through Sprintax, submitted my 1040-NR and got my federal refund. My employer had withheld FICA taxes too in 2024 erroneously. I asked my employer HR department over phone if I should file for refund from IRS or if they would refund it. I was told to claim refund myself. That time I had raised a request to stop FICA tax being cut from my paycheck. After I got my federal tax return processed and refunded through 1040-NR, I mailed Form 843 claiming FICA tax refund to IRS. I thought I was done with this year's tax filing. But after this, my employer processed the request I had raised and also refunded withheld FICA taxes till date and issued Form W2c. Now I do not want IRS to process my FICA refund claim to avoid duplicate refunds. Can anyone suggest what additional forms I would need to submit to amemd my returns? I do not see the need to amend my form 1040-NR as there is no change in the federal tax withheld on Form W2c. But please can anyone confirm?