Employer State ID Number Missing in Box 15 - Filing for WA State

Hi, I am currently filing my taxes, and I ran into an issue with missing information in 'box 15', as it reads, 'WA' under state in 'box 15', but the Employer's state ID Number is missing. I have $xxx.xx in State wages , tips, etc. in 'box 16', and 0.00 in State income tax in 'box 17'. Turbo Tax will not let me proceed without putting the Employer's State ID Number in 'box 15'. How do I go about this?

 

Thank you!