January 31, 2007
Deadline for employers to mail out Form W-2 and for payers to furnish Form 1099 statements to payees.

February 15, 2007
Deadline for employees who claim exemption from withholding to file a new Form W-4 with their employers.

February 28, 2007
Deadline for employers to file Form W-2 and Form 1099 statements with the Social Security Administration if filing on paper or magnetic media.

March 1, 2007
Deadline for farmers and fishermen who have a balance due on their taxes to file their individual tax return and pay the balance due without any late payment penalties.

March 15, 2007
Deadline for corporate tax returns (Forms 1120, 1120A, and 1120S), or to request automatic 6-month extension of time to file (Form 7004).
Final deadline to file an amended corporate tax return (Form 1120X) for tax year 2003 and still claim a tax refund.

March 31, 2007
Deadline for employers to file Form W-2 and Form 1099 Statements with the Social Security Administration if filing electronically.

April 17, 2007
Deadline to file individual tax returns (Form 1040, 1040A, or 1040EZ) or to request an Automatic Extension (Form 4868).
Last day to make contribution to traditional IRA or Roth IRA for 2006 tax year.
1st quarter estimated tax payments due for 2007 tax year.
Final deadline to file an original tax return (Form 1040) for tax year 2003 and still claim a tax refund.
Final deadline to file amended tax return (Form 1040X) for tax year 2003 and still claim a tax refund. (Be sure to mail the amended return well before April 16th to make sure your tax refund will be processed in a timely manner.)

Deadline to file estate or trust tax returns (Form 1041) or to request an automatic 6-month extension of time to file (Form 7004).

Deadline to file partnership tax returns (Form 1065) or to request an automatic 6-month extension of time to file (Form 7004).

Final deadline for estates, trusts, or partnerships to file an amended tax return and still claim a tax refund for the year 2003.

May 15, 2007
Deadline for non-profit organizations to file information returns (Form 990), or request an extension (Form 8868).

June 15, 2007
2nd quarter estimated tax payments due for 2007 tax year.

Deadline for US citizens living abroad to file individual tax returns or to request an additional 4-month extension (Form 4868). (Tip: request an automatic extension by April 17th, 2007, instead.) I provide useful information for claiming the Foreign Earned Income Exclusion and the Foreign Tax Credit, two tax breaks essential for Americans working abroad.

June 30, 2007
Deadline to file TD F 90-22.1 Report of Foreign Bank Accounts if you have over $10,000 held in foreign bank accounts.

September 17, 2007
3rd quarter estimated tax payments due for 2007 tax year.

Final deadline to file corporate tax returns (Forms 1120, 1120A, 1120S).

October 15, 2007
Final deadline to file individual tax returns (with extension). Final day for e-file.

Final deadline to file trust tax returns (Form 1041) if an extension was requested.

Final deadline to file partnership tax returns (Form 1065) if an extension was requested.

November 2007
Start planning any year-end tax moves.

December 31, 2007
Last day to make any 2007 tax year moves.

Marital status on this date determines your marital status for the whole year.