SPOKANE — The U.S. Postal Service’s Spokane Processing & Distribution Center, 2928 S. Spotted Rd., will collect federal income tax filings up to midnight to ensure getting an April 18 postmark.

Here are some tax mailing tips:

• Make sure your tax return has sufficient postage. First-Class postage is 44-cents for the first ounce and 20-cents for each additional ounce. If you are mailing a number of supplementary forms and schedules with your return, the envelope is likely to weigh more than one ounce.
• The IRS will not pay postage due. Mail with insufficient postage is returned to sender. If you are in doubt about how much postage to apply, use a lobby scale, the scale on an APC (Automated Postal Center) or ask a postal clerk for assistance.
• If possible, mail your return using the pre-addressed envelope provided by the IRS. If you must prepare another envelope, make sure the address is legible and include your return address.
• When mailing your return at a post office not on the list for late pickup, check the times posted on the blue collection box to determine the last scheduled pickup time.
• Remember, postage can be purchased at any Automated Postal Center (APC). Check usps.com for a location near you.

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A self-supporting government enterprise, the U.S. Postal Service is the only delivery service that reaches every address in the nation, 150 million residences, businesses and Post Office Boxes. The Postal Service receives no tax dollars for operating expenses, and relies on the sale of postage, products and services to fund its operations. With 32,000 retail locations and the most frequently visited website in the federal government, usps.com, the Postal Service has annual revenue of more than $67 billion and delivers nearly 40 percent of the world’s mail. If it were a private sector company, the U.S. Postal Service would rank 29th in the 2010 Fortune 500. Black Enterprise and Hispanic Business magazines ranked the Postal Service as a leader in workforce diversity. The Postal Service has been named the Most Trusted Government Agency six consecutive years and the sixth Most Trusted Business in the nation by the Ponemon Institute.