Make sure you thoroughly review the two information brochures from the SCRS: Investing for Your Retirement and Select Your Retirement plan. For more information, consult the SCRS Member Brochure and the PORS Member Brochure(eligibility to retire is different). For SCRS and PORS Defined Benefits Plans, the State of South Carolina web site features a Benefit Calculator and a Service Purchase Cost Calculator. The State of South Carolina Retirement System web site also offers a Benefit Comparison Calculator between the SCRS Traditional Plan and the State ORP.
Additionally, any information you need about the Social Security Administration can be found on their web site at http://www.ssa.gov.