Returning gross value of joining bonus - how to get IRS refund?
I received 10k joining/sign on bonus from a company in 2018 (gross 10k, tax 3.5k) I'm leaving in 2019, before the lock-in period ends. Contractually I'm required to repay the gross amount when I leave. So, I'm returning 10k from tax assessment year 2018, in tax assessment year 2019.
How do I get back the 3.5k from the IRS? Can I get it back sooner than April 2020? What do I need from the employer for this - assume employer is hostile and will not respond after I leave the place.
(not Microsoft, I joined another employer who I want to leave asap)
Have any of you done this in the past?