Thanks for posting @user12,
You'll get a warning when there is a missing field on your payroll setup. If you don't have to e-file for your state tax, you can ignore the warning. Doing this won't affect your federal taxes.
You might also want to edit your payroll settings by following these steps:
- Go to Gear at the top.
- Select Payroll settings.
- Choose your state and make an update.
- Click OK.
You can check out this guide to learn more about the Washington Payroll Tax Compliance.
Additionally, here's a link that covers all tasks you can do when using the payroll feature.
Fill me in if you still have questions or concerns with payroll. I'm always here to assist you. Take care and have a nice day ahead.