Additionally, the Department provides a fillin worksheet to assist in the calculation of the credit. You can apply: Online; or; By calling our national toll-free service at 1-800-772-1213 (TTY 1-800-325-0778) or visiting your local Social Security office.Complete your retirement application​​ To apply for your retirement benefits, you'll need to complete the appropriate retirement application for your plan. Apply for your monthly retirement benefit any time between age 62 and 70. In order to retire and begin receiving a monthly pension, you must complete and return a Service Retirement Application. Submitting a form ; Age and Service Retirement Benefit - Pop Up Request (Plan F) (SR-1PUF). This is a fillable form. IRAs allow you to make taxdeferred investments to provide financial security when you retire. BE SURE TO COMPLETE THE FOLLOWING ON YOUR SERVICE RETIREMENT APPLICATION: □ Fill out your personal and contact information. □ Choose a retirement date.