WASHINGTON — The Internal Revenue Service today reminded Boston area taxpayers and others affected by the April 15 Boston Marathon explosions that their individual income tax returns and tax payments are due Monday, July 15.

This relief applies to all individual taxpayers who live in Suffolk County, Mass., including the city of Boston. It also includes victims, their families, first responders, others impacted by this tragedy who live outside Suffolk County and taxpayers whose tax preparers were adversely affected.

The relief gives eligible taxpayers until July 15, 2013, to file their 2012 returns and pay any taxes normally due April 15. No filing and payment penalties will be due as long as returns are filed and payments are made by July 15. By law, interest, currently at the annual rate of 3 percent compounded daily, will still apply to any payments made after the April deadline.

The IRS automatically provided this extension to anyone living in Suffolk County. Eligible taxpayers living outside Suffolk County must have claimed this relief by calling 866-562-5227 before filing a return or making a payment. Eligible taxpayers who receive penalty notices from the IRS can also call this number to have these penalties abated.

Eligible taxpayers who need more time to file their returns may receive an additional extension to Oct. 15, 2013, by filing Form 4868 by Monday, July 15.

Taxpayers with questions unrelated to the Boston tragedy should visit IRS.gov, or contact the regular IRS toll-free number at 800-829-1040.

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Upcoming Tax Dates

October 10 — Everyone
Federal Holiday (Columbus Day) - Details

October 11 — Employees who work for tips
If you received $20 or more in tips during September, report them to your employer - Details

October 13 — Communications and air transportation taxes under the alternative method (special September deposit rule).
Deposit the tax included in amounts billed or tickets sold during the period beginning September 12 and ending September 15.

October 14 — Regular method taxes (special September deposit rule).
Deposit the tax for the last 4 days of September.

October 17 — Individuals
If you have an automatic 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 - Details

October 17 — Partnerships
Electing large partnerships: File a 2015 calendar year return (Form 1065-B). This due date applies only if you were given an additional 6-month extension - Details

October 17 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in September.

October 17 — Nonpayroll withholding
If the monthly deposit rule applies, deposit the tax for payments in September.

October 26 — Communications and air transportation taxes under the alternative method.
Deposit the tax included in amounts billed or tickets sold during the last 15 days of September.

October 28 — Regular method taxes
Deposit the tax for the first 15 days in October.

October 31 — Certain small employers
Deposit any undeposited tax if your tax liability is $2,500 or more for 2016 but less than $2,500 for the third quarter.

October 31 — Federal unemployment tax
Deposit the tax owed through September if more than $500.

October 31 — Form 720 taxes.
File Form 720 for the third quarter of 2016.

October 31 — Wagering tax
File Form 730 and pay the tax on wagers accepted during September.

October 31 — Heavy highway vehicle tax
File Form 2290 and pay the tax for vehicles first used in September.

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