No sooner than 120 days before you plan to retire. You can also file for retirement up to sixty days after you leave public service. You can file after sixty days but your benefits will not be retroactive to your retirement date. Therefore, the Everett Retirement Board strongly recommends that you plan your retirement before leaving your job. Certain retirement options will not be available to you once you stop working. You should therefore obtain counseling from the Everett Retirement Board before you stop working.