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Hello

i received a large sign on bonus in 2019 for a new job and I am thinking of leaving the job This year. I know I will need to repay back the sign on prorated and it would be over 3k. My question is.. if my employer does not give me a W2 for 2020 showing the repayment amount (since I’m not sure if they are federally/legally required to reflect the repayment amount)... would I still be able to claim that amount back on my year 2020 tax return? Thank you