No fix is needed. Rather, the information you've input into the TurboTax program may have indicated that you are eligible for the new Washington State Working Families Tax Credit (WFTC).
Although there's not a state income tax for Washington, TurboTax has integrated the new credit into the program. Washington residents who are eligible for the credit can claim it within their TurboTax account. There's no need to create a separate submission to the state.
See the TurboTax Help article Can I file for the Washington State Families Tax Credit using TurboTax? for more information.
