Washington workers will have up to 12 weeks of paid family or medical leave starting in 2020. Employers begin payroll withholding in 2019.Washington State Disability Insurance (SDI) Rates. The priority of withholding is current support first, the health insurance premium second, and past-due support last. He also has Washington FLI being deducted. Security Taxable Wage Base. The average combined rate is 9.38 percent, giving Washington the fourthhighest sales tax rate in the nation, according to the Tax Foundation. Unfortunately, WA State has stated that they will not be providing any reporting forms (1099G) for paid medical leave, only for paid family leave. If you don't receive SSI benefits, you need to complete a Proof of Disability Form (125 KB PDF download). Washington does not use a state withholding form because there is no personal income tax in Washington.