Complex sentence: The benefits someone is eligible for are potentially so complicated that potential retirees should consult the Social Security Administration directly for advice--many questions are addressed and at least partially answered on many on-line publications and on-line calculators.
Split into simpler sentences: The benefits someone is eligible for are potentially so complicated that potential retirees should consult the Social Security Administration directly for advice. Many questions are addressed and at least partially answered on many online publications and online calculators.