- February 28 – Payers must file information returns, such as Form 1099s, with the IRS. This deadline is extended to April 1 for electronic filing.
- February 28 – Employers must send Form W-2 copies to the Social Security Administration. This deadline is extended to April 1 for electronic filing.
- March 1 – Farmers and fishermen who did not make 2012 estimated tax payments must file 2012 tax returns and pay taxes in full.
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