Tax Filing Tips, Locations For Tuesday's Tax Day

Listing Of U.S. Post Office Locations, Hours

The U.S. Postal Service says it's ready for a last-minute wave of people filing tax returns on Tax Day, which this year falls on Tuesday, April 17.

That's because this year the normal filing day, April 15, falls on a Sunday, and Monday is a holiday in Washington, D.C.

Last year, taxpayers filed more than 234 million income tax returns, and almost one-quarter of those were mailed, the Postal Service says.

Officials remind people there are no tax forms available at post offices, but people can find the forms at

While all area post office retail windows will be open during regular customer service hours on Tuesday, the only Denver post office providing retail service until the midnight tax deadline is the Denver GMF Financial facility at 7500 E. 53rd Place.

The following offices will postmark tax returns up to midnight Tuesday. There will be no retail services, but the collection boxes outside the office will be available for properly stamped envelopes, postal officials said.

  • Bear Valley Station, 7555 W. Amherst
  • Capitol Hill Station, 1571 Marion St.
  • Downtown Station, 951 20th St.
  • Glendale Station, 945 Birch St.
  • GMF Finance Station, 7500 E. 53rd Place
  • Lakewood Station, 10799 W. Alameda Ave.
  • Mile High Station, 450 W. 14th St.
  • Montclair Station, 8725 E. 11th Ave.
  • North Pecos Station, 1411 Cortez St.
  • Northglenn Station, 11887 Washington St.
  • South Station, 225 S. Broadway
  • Sullivan Station, 8700 E. Jefferson Way
  • University Park Station, 3800 Buchtel Blvd.

The Postal Service offers the follow tax mailing tips.

  • Apply the proper postage or stamps, especially if enclosing extra forms and schedules. Using a regular size Number 2 envelope, First Class postage costs 44 cents for the first ounce.
  • For heavier returns, add .20 cents postage for each additional ounce.
  • If you are not sure about the correct postage, it is best to add additional stamps, or take your forms to the Post Office to ensure that correct postage is applied.
  • Make sure you print the proper IRS address on the front of the envelope.
  • Print your return address in the upper-left-hand corner of your tax mail envelope.
  • Customers who wish certification that their tax mail form is received by IRS, should mail it using Certified Mail Service available at your local post office.
  • While encouraged to mail before April 18; if you do wait until late on Tax Day, be sure to drop off your tax mail return at a postal location that offers late tax mail collection or pick-up.
  • Customers with IRS tax questions can contact the IRS at 1-800-829-1040 or go to
  • Customers can call 1-800-ASK-USPS (1-800-275-8777) to find out the regular customer service hours of their local post office.
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