Postal Service extends acceptance of mail for April 15 tax filing deadline postmark at select locations

April 06, 2009 

CALIFORNIA — The U.S. Postal Service will accept mail late at select locations in California on April 15 for last-minute tax filers who want the safety and security of sending their personal information on tax returns through the U.S. Mail.

Alameda County
Berkeley Post Office
2000 Allston Way
Berkeley CA 94704
Mail acceptance until 10 PM
Oakland Main Post Office
1675 7th St
Oakland CA 94615
Mail acceptance until midnight
Fremont Main Post Office
37010 Dusterberry Way
Fremont CA 94536
Mail acceptance until 10 PM
Pleasanton Main Post Office
4300 Black Ave
Pleasanton CA 94566
Mail acceptance until 6 PM
Hayward Main Post Office
24438 Santa Clara St
Hayward CA 94544
Mail acceptance until 7 PM
Union City Post Office
33170 Alvarado Niles Rd
Union City CA 94587
Mail acceptance until 10 PM
Contra Costa County
Antioch Post Office
2730 W Tregallas Rd
Antioch CA 94509
Mail acceptance until 10 PM
Lafayette Post Office
3641 Mt Diablo Blvd
Lafayette CA 94549
Mail acceptance until 6 PM
Concord Main Post Office
2121 Meridian Park Blvd
Concord CA 94520
Mail acceptance until 10 PM
San Ramon Post Office
12935 Alcosta Blvd
San Ramon CA 94583
Mail acceptance until 9 PM
Danville Post Office
2605 Camino Tassajara
Danville CA 94526
Mail acceptance until 6 PM
Humboldt County
Eureka Main Post Office
337 West Clark St
Eureka CA 95501
Mail acceptance until 11 PM
Retail service until midnight
Los Angeles County
Airport Station
9029 Airport Blvd
Los Angeles CA 90009
Retail svc/Mail acceptance until midnight
Pasadena Main Post Office
600 Lincoln Ave
Pasadena CA 91109
Retail svc/Mail acceptance until 10 PM
Industry Processing Center
15421 E Gale Ave
City of Industry CA 91715
Mail acceptance until midnight
Retail service until 6 PM
Long Beach Processing Center
3400 Redondo Blvd
Long Beach CA 90809
Mail acceptance until midnight
Retail service until 7 PM
Van Nuys Main Post Office
15701 Sherman Way
Van Nuys CA 91409
Retail svc/Mail acceptance until midnight
Los Angeles Processing Center
7001 S Central Ave
Los Angeles CA 90052
Mail acceptance until midnight
Retail service until 10 PM
Marin County
San Rafael Mail Post Office
40 Bellam Blvd
San Rafael CA 94901
Retail service until 8 PM
Napa County
Napa Post Office
1625 Trancas St
Napa CA 94558
Mail acceptance until 8 PM
Orange County
Santa Ana Processing Center
3101 W Sunflower Ave
Santa Ana CA 92799
Mail acceptance until midnight
Retail service until 7 PM
B&B Pharmacy Contract Postal Unit
18525 Yorba Linda Blvd
Yorba Linda CA 92886
Retail svc/Mail acceptance until 10 PM
Riverside County
Riverside Main Post Office
4150 Chicago Ave
Riverside CA 92507
Retail svc/Mail acceptance until midnight
San Bernardino County
San Bernardino Processing Center
1900 W Redlands Blvd
Redlands CA 92373
Retail svc/Mail acceptance until midnight
San Diego County
San Diego Main Post Office
2535 Midway Dr
San Diego CA 92110
Retail svc/Mail acceptance until midnight
El Cajon Main Post Office
401 W Lexington Ave
El Cajon CA 92020
Mail acceptance until 6:30 PM
Chula Vista Main Post Office
750 3rd Ave
Chula Vista CA 91910
Mail acceptance until 6:30 PM
San Francisco County
San Francisco Processing Center
1300 Evans Ave
San Francisco CA 94124
Retail svc/Mail acceptance until midnight
San Mateo County
Redwood City Main Post Office
1100 Broadway St
Redwood City CA 94063
Mail acceptance until midnight
Retail service until 10 PM
SF Airport Branch
660 West Field Rd
San Francisco CA 94128
Retail service until midnight
Santa Barbara County
Santa Barbara Processing Center
400 Storke Rd
Goleta CA 93199
Retail svc/Mail acceptance until 8 PM
Solano County
Vallejo Post Office
485 Santa Clara St
Vallejo CA 94590
Mail acceptance until 6 PM

Unless noted above, Post Office retail lobbies will adhere to their normal hours of service, and collection boxes and Post Office lobby drops will be collected at their regular posted times on April 15. According to the Internal Revenue Service, 63 million of the 148 million tax returns filed nationally last year were done hardcopy through the U.S. Mail.

Tips for tax return mailers

  • Get postage calculations quickly and easily this tax season at
  • Mail tax returns early in the day. Post Offices are very busy in the late afternoon and evening.
  • Even after closing, postage stamps may be purchased from Automated Postal Centers (APCs). Mailers will find APCs in many of the larger Post Offices. APCs weigh articles, print address labels with postage already affixed and vend postage stamps. APCs accept debit/credit cards for payment.
  • Mailers depositing tax returns in a blue collection box or drop slot at the Post Office should check the last pickup time posted on the schedule. Except at Post Offices offering extended collection hours, tax returns deposited after the last pickup time will not be postmarked April 15 and the tax return will be considered late.
  • Tax agencies will not pay postage due. Mailers are encouraged to make sure that adequate postage is applied.

Postage: Letter sizes go up to 11-1/2” x 6-1/8” and less than ¼” thick cost 42 cents for the first ounce and 17 cents each additional ounce up to 3.5 ounces. More than 3.5 ounces, see “Flats” prices.

  • Flats prices: Sizes go up to 15” x 12” and less than ¾” thick cost 83 cents for the first once and 17 cents for each additional ounce up to 13 ounces.
  • More than 13 ounces, use Priority Mail.
  • Check for a complete postage rate calculator.

Proof of Mailing/Delivery: Mailers who desire proof of mailing and delivery should request “Certified Mail with Return Receipt” when mailing tax returns.

Tax forms: Most Post Offices do not carry tax forms; only the most basic forms are available in Post Offices that do. Filers should contact a local IRS or Franchise Tax Board office for forms they need or check the tax agency's website for downloadable forms at or

Special notice: Federal Aviation Administration security guidelines are still in effect. Mail with postage paid by traditional postage stamps (not postage meter strips or PC Postage labels) that weigh over 13 oz. must be presented to a postal clerk at a Post Office rather than deposited in a collection box. Returns meeting this description that are deposited in collection boxes will be returned to the sender.

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An independent federal agency, the U.S. Postal Service is the only delivery service that reaches every address in the nation, 149 million residences, businesses and Post Office Boxes, six days a week. It has 34,000 retail locations and relies on the sale of postage, products and services, not tax dollars, to pay for operating expenses. Named the Most Trusted Government Agency five consecutive years by the Ponemon Institute, the Postal Service has annual revenue of $75 billion and delivers nearly half the world’s mail.

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