State tax filing

I have not filed my state return yet. If I change the state wages in Box 16 to the amount on the corrected W-2 ($0) and keep box 17 as the original W-2 value, it works and my calculated Oregon refund is correct. However the W-2C my employer sent me also changed Box 17 (State income tax) to $0. If I enter $0 for state tax on TurboTax I get the original problem of not getting the correct return amount. Could this be a mistake in the W-2C sent by my employer?