Late-night mail collections and other services will be available at 28 Utah post offices to assist last-minute tax filers Wednesday, April 15.

Many Utah post offices will also extend window service hours.To avoid large crowds, the Postal Service urges customers to mail their income tax returns early and ensure that each envelope has proper postage.

First-class postage is 32 cents for the first ounce and 23 cents for each additional ounce.

Those who mail late in the day April 15 should take their tax returns to collection boxes located directly outside post offices that have extended hours.

While many post offices will extend hours, stamps can always be purchased through vending machines at each post office.

Here's a list of facilities that will have extended hours and service April 15:

Salt Lake County

Collections will be taken and stamps sold until midnight at the Downtown Station, 230 W. 200 South; Main Post Office, 1760 W. 2100 South; Holladay Branch, 2350 Arbor Lane; Sugar House Station, 1953 S. 1100 East; Murray Branch, 4989 S. State; West Valley City Branch, 3490 S. 4400 West; Sandy Main Post Office, 8850 S. 700 East; and West Jordan Main Post Office, 7901 S. 3200 West.

At the Salt Lake International Airport Post Office, 320 N. 3700 West, collections will be taken until midnight. Stamps are sold there 24 hours a day, 365 days a year.

Davis County

Bountiful Main Post Office, 29 S. Main, collections available and stamps sold until midnight; and Layton Post Office, 1123 N. Fairfield Road, collections until midnight.

Utah County

American Fork Post Office, 55 N. Merchant, collections available and stamps sold until 9 p.m.; Orem Mountain Shadows Station, 877 E. 1200 South, collections until midnight, stamps sold until 10 p.m.; Orem Main Post Office, 222 W. Center, collections until midnight; Provo East Bay Post Office, 936 S. 250 East, collections available and stamps sold until midnight.

Tooele County

Grantsville Post Office, 36 W. Main, collections until midnight; and Tooele Post Office, 65 N. Main, collections until midnight.

Summit County

Park City Snyderville Branch, 6440 Highway 224, collections available and stamps sold until midnight.

Weber County

Ogden Main Post Office, 3680 Pacific Ave., collections available and stamps sold until midnight; Ogden Ben Lomond Station, 221 N. Washington Ave., collections until midnight; and Ogden Town Station, 2641 Washington Blvd., collections until midnight.

Other locations

Castle Dale Post Office, 55 S. Center St., collections until midnight; Cedar City Main Post Office, 333 N. Main, collections until midnight; Delta Post Office, 86 S. 300 East, collections available and stamps sold until midnight; Logan Main Post Office, 151 N. 100 West, collections until midnight; Richfield Main Post Office, 93 N. Main, collections until midnight; St. George Red Rocks Station, 1150 E. Riverside Drive, collections available and stamps sold until midnight; and Vernal Main Post Office, 67 N. 800 West, collections until midnight.