relocation tax is it too late for grossing up for 2022?

Hi,

This is my first tax filing after moving from Hong Kong to the US in September 2022. As part of the move my company was very nice in helping me move and paid $24k in relocation expenses. However, it was only until I was about to fly I found out this was all taxable. They said there were thinking about grossing up the amount so I don't have to pay the tax. However, they have already submitted the w2 form for 2022 and I can see about $7k tax withheld so I'm guessing it's to do with that? Is it too late to gross up and resubmit again? I suppose even if they paid a separate bonus to cover that (including the tax for that bonus) it's still going to affect my tax for next year (2023)?

Thanks,
Chris