Senior citizens and people with disabilities exemption and deferred income thresholds Income thresholds: 2020 - 2024 2019 and prior More information Property tax exemption program for senior citizens and disabled persons Property tax deferral program for senior citizens and disabled persons RCW 84.36.379 - 84.36.389 84.38 WAC 458-16A-100 - 458-16A-150 458-18 More information Property tax exemption program for senior citizens and disabled persons Property tax deferral program for senior citizens and disabled persons RCW 84.36.379 - 84.36.389 84.38 WAC 458-16A-100 - 458-16A-150 458-18