I send first my W2 and IRS send my tax return.
But now I have 1099 for the same year what can I do now?

File amended tax return Form 1040X with schedule C or C-EZ. 1099-misc income is reported on schedule C or C-EZ. Pay the tax due on or before April 15, 2010. Your U.S. Tax Return: Tax Filing by Self Employed Sole Proprietor or Independent Contractor