Federal Tax Calendar Here are some key dates for the current tax year.

2016

15January

Fourth quarter 2015 estimated tax due. Use Form 1040-ES.

1February
Deadline for employers to provide copies of Forms W-2 and 1099 for 2015 to employees.
16February
If you claimed exemption from income tax withholding last year on the Form W-4 you gave your employer, you must file a new Form W-4 by February 17 to continue your exemption for another year.
29February
Deadline for farmers and fishermen who have a balance due on their taxes to file their 2015 individual income tax returns and pay the balance due without penalties.
15March
Deadline for 2015 corporate tax returns (Forms 1120 and 1120-S) or to request an extension using Form 7004.
18April
Deadline to file 2015 individual income tax returns (Form 1040, 1040A, or 1040EZ) and any taxes owed, or to file for an automatic 6-month extension. (Note: If you are a resident of Massachusetts or Maine, Patriots’ Day (April 18) delays the due date for filing your income tax return until April 19.)
18April
Last day to contribute to a traditional IRA, Roth IRA, or SEP-IRA for the 2015 tax year.
18April
First quarter 2016 estimated tax due. Use Form 1040-ES.
18April
Deadline to file 2016 trust tax returns (Form 1041) or to request an automatic extension.
18April
Deadline to file 2016 partnership tax returns (Form 1065) or to request an automatic extension (Form 7004).
15June
Deadline for U.S. citizens living abroad to file individual tax returns and pay any tax, interest, and penalties due, or to request a 4-month extension (Form 4868).
15June
Deadline for U.S. citizens living abroad to file individual tax returns and pay any tax, interest, and penalties due, or to request a 4-month extension (Form 4868).
15September
Third quarter 2016 estimated tax due. Use Form 1040-ES.
1October
Deadline for existing employers to establish a SIMPLE IRA plan.
17October
If you were given a 6-month extension to file your income tax return for 2015, file Form 1040, 1040A, or 1040EZ and pay any tax, interest, and penalties due.
17October
Final deadline to file 2015 partnership tax return if you were given a 6-month extension.