WASHINGTON — The Internal Revenue Service today issued guidance that allows certain estates of married individuals who died during the first six months of 2011 an extension of the deadline to make the portability election.

The portability election passes along a decedent's unused estate and gift tax exclusion amount to a surviving spouse. An extension is available to estates of married individuals with assets of $5 million or less, but only if the decedent died in the first six months of 2011, and the executor files Form 4768 requesting an extension no later than 15 months after the decedent's date of death.

The extra time is available to an estate even if the estate did not request an automatic six-month filing extension on Form 4768 prior to the regular nine-month filing deadline. As a result, these estates will now have until 15 months after the date of death, rather than the usual nine months, to make the election by filing an estate tax return on Form 706. Thus, the first estate tax returns for estates eligible to make the portability election (because the date of death is after Dec. 31, 2010) are now due on Monday, April 2, 2012.

Affected estates should submit both a properly-prepared Form 4768 and Form 706 to the IRS no later than 15 months after the decedent's date of death. Further details are in Notice 2012-21, posted today on IRS.gov.

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Upcoming Tax Dates

September 7 Everyone
Federal Holiday (Labor Day) - Details

September 10 Employees who work for tips
If you received $20 or more in tips during August, report them to your employer - Details

September 10 Communications and air transportation taxes under the alternative method.
Deposit the tax included in amounts billed or tickets sold during the first 15 days of August.

September 14 Regular method taxes
Deposit the tax included in amounts billed or tickets sold during the last 16 days of August.

September 15 Individuals
Make a payment of your 2015 estimated tax if you are not paying your income tax for the year through withholding (or will not pay in enough tax that way). Use Form 1040-ES. This is the third installment - Details

September 15 Corporations
File a 2014 calendar year income tax return (Form 1120) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension - Details

September 15 S Corporations
File a 2014 calendar year income tax return (Form 1120S) and pay any tax due. This due date applies only if you timely requested an automatic 6-month extension - Details

September 15 Partnerships
File a 2014 calendar year return (Form 1065). This due date applies only if you were given an additional 5-month extension - Details

September 15 Corporations
Deposit the third installment of estimated income tax for 2015 - Details

September 15 Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in August.

September 15 Nonpayroll withholding
If the monthly deposit rule applies, deposit the tax for payments in August.

September 25 Communications and air transportation taxes under the alternative method.
Deposit the tax included in amounts billed or tickets sold during the last 16 days of August.

September 29 Regular method taxes
Deposit the tax for the first 15 days of September.

September 29 Regular method taxes (special September deposit rule)
Deposit the tax for the period beginning September 16 and ending September 26.

September 29 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 1 and ending September 11.

September 30 Wagering tax
File Form 730 and pay the tax on wagers accepted during August.

September 30 Heavy highway vehicle use tax
File Form 2290 and pay the tax for vehicles first used in August.

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