This page explains how to file the report for unemployment insurance. Learn about reporting and tax requirements for Paid Leave and WA Cares .Employer forms, posters and publications. Access a variety of forms and publications for employers. The online registration process can take up to 2 days. Once completed you will be notified of your tax deposit schedule. If you're in Washington State, below is a list of all the paperwork necessities when onboarding. Employment Eligibility Verification (Form I-9). The approved policy and procedure. Employees are not required to complete a state tax withholding form.