To amend title II of the Social Security Act to strengthen the Social Security system to meet the challenges of the next century.

Social Security Amendments of 1999 - Amends title II (Old Age, Survivors and Disability Insurance) of the Social Security Act (SSA) to: (1) make additional appropriations as specified from the general fund in the Treasury for periodic transfer to the Federal Old-Age and Survivors Insurance Trust Fund (social security trust fund) for FY 2000 through 2014, with the transferred amounts to be...