On: I took a job at Amazon, only to leave after 10 months

[pcthrowaway]

If you get a signing bonus that you pay taxes on, then have to return part of it the following year, do you get to deduct it from taxes?

[junar → pcthrowaway]

Yes, as long as the amount you repaid exceeds $3,000.

https://www.irs.gov/publications/p525#en_US_2020_publink1000...

[delecti → pcthrowaway]

I stayed over 5 years, so I never had to repay any bonus. I can't be sure what the tax implications would be of it, but based on what I know about taxes (more than most, less than an expert) I suspect it would count against your taxable income in the year when you had to pay it back.