Washington State does not have Income Tax

I'm trying to e-file my federal tax forms as a Washington resident. I will not let me just file federal from Washington. It continually tries to get me to file state as well and we do not have state income tax. If I remove the state return, it wants me to print out the forms and mail them in. Also, I've never ever had to pay to e-file returns in the at least 10 years I've been using Turbo Tax. I'm so confused.