The IRS has your correct Social Security number. You should make sure that your employer corrects your Social Security number promptly. And, as fanfare said, check your Social Security earnings record. You will probably have to get the Social Security Administration to correct it. See the following FAQs on the Social Security web site.
How can I get a Social Security Statement that shows a record of my earnings and an estimate of my f...
How do I correct my earnings record?
