Here are some key dates for the current tax year.

2016

January

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

February

1 – Deadline for employers to provide copies of Forms W-2 and 1099 for 2015 to employees.

16 – 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.

29 – 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.

March

15 – Deadline for 2015 corporate tax returns (Forms 1120 and 1120-S) or to request an extension using Form 7004.

April

18 – 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.)

18 – Last day to contribute to a traditional IRA, Roth IRA, or SEP-IRA for the 2015 tax year.

18 – First quarter 2016 estimated tax due. Use Form 1040-ES.

18 – Deadline to file 2016 trust tax returns (Form 1041) or to request an automatic extension.

18 – Deadline to file 2016 partnership tax returns (Form 1065) or to request an automatic extension (Form 7004).

June

15 – 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).

15 – Second quarter 2016 estimated tax due. Use Form 1040-ES.

September

15 – Third quarter 2016 estimated tax due. Use Form 1040-ES.

October

1 – Deadline for existing employers to establish a SIMPLE IRA plan.

17 – 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.

17 – Final deadline to file 2015 partnership tax return if you were given a 6-month extension.