2022 W2-C no numbers in Box 1 and 2

I've received my 2022 W-2C after filing my return. It appears that only the numbers in boxes 3, 4, 5, and 6 have been corrected. Do I need to file an amendment? Will this affect my tax refund or payment? The reason for these corrections is because I left the company earlier than anticipated, as outlined in my sign-on letter, and subsequently returned half of my sign-on bonus. 

Also, what is the process on Windows version? Should I edit the existing W2 or file a new one? If I need to start with a new one, there is no number on the box  1 & 2, should I use last year's information?