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What are important dates for the US tax year?

In 2018:

January: The fiscal year is the same as the calendar year. 

January 10: Form 4070: report tips on the 10th of every month, excluding months when the 10th is on a weekend or a bank holiday. 

January 17: Form 1040ES: only if you didn’t pay your income tax through withhholding 

February 15: Deadline for individuals and businesses 

(If you claimed an exemption from income tax withholding last year on Form W­4, Employee's Withholding Allowance Certificate, you must file a new Form W­4 by this date to continue your exemption for another year.) 

To give annual statements to recipients of specific payments made in 2017. Business can use the appropriate version of Form 1099. Form 1099 can be issued electronically with the consent of the recipient.

February 28: Deadline for businesses to submit forms 1099 and 1096, if filing on paper. These documents relate to business transactions that aren’t covered by W2 (anything that falls outside of tips and wages – hiring an independent contractor, etc.). If filing electronically, the deadline is March 31.

March 15: Deadline for corporate tax returns. Corporations who use the calendar year as their tax year (i.e. their deadlines don’t straddle 2017 and 2018) are eligible for a 6 month extension but must apply for it by this date.

March 31: Deadline for electronic Filing of Forms 1097, 1098, 1099, 3921, 3922, and W-2GS. This date applies only if you file these forms electronically.

Abril 15: Last day to file an original or amended tax return from 2014 and claim a rebate  unless you have an extension, then this is October 15, 2018.

Abril 17: File a 2017 income tax return (Form 1040, 1040A, or 1040EZ) and pay any tax due.

Last day to contribute to an Individual Retirement or Health Savings Account (IRA/HSA) and have it considered retroactive to 2017. 

Deadline for the first quarterly estimated tax payment of 2017.

May 15: Deadline for non-profit organizations to submit details to the IRS or request an extension. These organizations are required to submit a Form 990 or information return so IRS can evaluate their operations and insure they’re exempt from federal tax. 

June 15: Second quarter estimated payments are due on this date as well as tax returns and payments from U.S. citizens living abroad.

September 15: Third quarter estimated tax payments are due. If an extension was requested on corporate, trust income or partnership tax returns for the year 2017, this is the final deadline for filing.

October 1: If you’re self-employed or a small business owner, this is your last chance to set up a SIMPLE IRA for the year 2015.

October 16: Last day to file a Federal income tax return and FBAR (if applicable) for tax extension filers. 

December 31: Last day to make any tax moves for the year 2017.

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