this leaves you in a very unfortunate situation. technically if there was only a name change, the company should have opted for the election to claim credit for the wages and taxes paid under the old name and alerted ADP so it would not start anew for Social Security. i'm going by your statement that all that occurred was a a name change. becuase then the IRS would not require the company to get a new ein and without a new ein there is no reason adp should have over withheld on social security. talk to you real employer.
if that doesn't work
if the excess was withheld by employer error you can not take the credit, but must instead get a refund from your employer. If your employer refuses to do so, you can file form 843 to request a refund from the government. See page 240 of: http://www.irs.gov/pub/irs-pdf/p17.pdf
