I joined a company in Dec 2024 and received a signing bonus that same month (Dec 2024). I resigned from the company in April 2025 and returned the unvested bonus (9-months worth) back to the company (bonus was vested monthly for 12 months). My federal and CA tax were withheld for the entire 12-months worth of the bonus. I should be able to get the credit back for the 9-months worth of withheld federal and CA taxes (since I returned the 9-months worth of unvested bonus). I figured out how to claim the credit back from the IRS, but I have trouble finding the correct line to enter the credit (of IRC 1341 "Claim of Right") for either Form 540 or Form 540 CA . Can anyone help? Thanks.
