Confused about W2C after repaying employer for sign-on bonus

I joined a company in 2023 and got a 50k sign on bonus. I was there for approximately 4 months so I had to return a total prorated amount of ~33k. I paid them back the "post tax" prorated amount of ~20k in the same year but they didn't cash it until 2024 so they issued me a W2C.

 

On the W2C:
-They reduced box 3 and 5 by ~32k which is approximately the pre-tax amount that I owed

-They reduced box 4 and 6 by a couple thousand dollars too


I'm just really confused on what my next steps are and what credits I can claim before I file my 2023 tax return, especially because box 1 on my W2C wasn't corrected.

 

I'd really appreciate any guidance or help on this matter, thank you so much!