(Daniel Acker / Bloomberg)

Today is Tax Day — three days later than normal, thanks to a federal law that requires the Internal Revenue Service to move the tax deadline if a federal holiday or holiday in the District of Columbia falls on April 15. This year D.C. Emancipation Day was observed last Friday, pushing the deadline to today.

If you need some last-minute tips, the IRS has produced several “how-to” videos and is operating an IRS2Go app so taxpayers can monitor their refund status. And if you need more time, make sure to apply for an extension until Oct. 17.

Estimates suggest more than 70 percent of taxpayers will file online this year, but for those of you sending in paper versions, very few post offices are staying open late for procrastinators.

In Washington, just two post offices are staying open later — and only until 8 p.m.:

• Friendship Station: 4005 Wisconsin Ave. N.W. Hours: 8 a.m. to 8 p.m.

• Dorothy I. Height Station (formerly National Capitol Station): 2 Massachusetts Ave. N.E. 9 a.m. to 8 p.m.

In Maryland, two are staying open until 8 p.m.:

• Hampton Park Post Office: 9201 Edgeworth Drive, Capital Heights. 9 a.m o 8 p.m.

• Suburban Plant: 16501 Shady Grove Rd Gaithersburg, 7:30 a.m. to 8 p.m.

In Virginia, the Merrifield post office in Fairfax at 8409 Lee Highway will be open until 8 p.m.

In years past, several post offices would remain open until midnight. An Arlington post office used to host a Tax Day jazz festival with vendors and food trucks as people dropped off tax filings.

But the later hours are no longer necessary because fewer customers are showing up to mail returns on the due date. According to the Postal Service, about 111.4 million returns entered the mail system on Tax Day in 2007, but only about 78 million were mailed on the deadline last year.

This year, USPS is estimating a 10 percent decline from last year’s Tax Day mailings — and tax mailings are down 23 percent overall from last year.

Once you file your returns, some companies are offering special Tax Day deals. The dating site Chemistry.com is giving potential customers a free three-day pass. Interested users must register by today.

And if you're hungry, the Bruegger’s Bagel chain is selling its “Big Bagel Bundles” for $10.40 ( in honor of the 1040 individual income tax form). The deal gets you 13 bagels and two cream cheese tubs.

Know of any other Tax Day deals? Leave the details in the comments section below.

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