- February 18 – Deadline for providing 2013 Forms 1099-B and 1099-S to recipients.
- February 28 – Payers must file 2013 information returns (such as 1099s) with the IRS. (Electronic filers have until March 31 to file.)
- February 28 – Employers must send 2013 W-2 copies to the Social Security Administration. (Electronic filers have until March 31 to file.)
- March 3 – Farmers and fishermen who did not make 2013 estimated tax payments must file 2013 tax returns and pay taxes in full.
- March 17 – 2013 calendar-year corporation income tax returns are due.
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