Recieved W-2C with new lower wages due to overpayment by employer

I received a new W-2C (corrected) for 2021 from my employer last week.  In 2021, I was overpaid $1,700 by employer (their fault) and I asked them to correct the problem.  The repayment wasn't until calendar year 2022 (even though I tried to repay earlier).  So, the corrected W-2c has lower numbers for boxes 3 through 5, BUT not box 1.  In the end, when amending via TT, this doesn't change my refund???  Amount refund remains $0 which baffles me.  And, since the refund is $0, do I need to file an amendment and send a paper 1040 to the federal and state (Virginia) tax offices?