For a lot of retirees, filing for Social Security felt like crossing a finish line. But the strategy behind that decision doesn't have to stay frozen the day you filed. Life shifts, and so does the way Social Security fits into your income picture. Revisiting it can be an important part of a good retirement income plan that spans a 20- or 30-year retirement, and there are a few developments right now that make this a good year to take another look.
