How to report refunded excess contribution of 401k

Hi there,

I changed jobs in June. My new employer cut more 401k than max. allowed. So they got Fidelity to refund the overpayment. But my W2 box 12D till shows the old amount and my employer is not willing to correct the W2. Please confirm if I should manually correct the 12D W2 entry in Turbotax to show the new amount (after the refund) or should I leave it as is. Thank you.