PORTLAND -- The IRS and the U.S. Postal Service have urged tax filers to get their returns in early. But if you're reading this, you might need some last-minute help.

(If you've already filed, here's some Tax Day trivia)

The Oregon Department of Revenue says filing electronically is the best way to get returns filed on time and ensure faster state refunds.

Click for tax forms, refund & payment info and FAQ from

The IRS also calls its e-file system the safest, fastest and easiest way to file your federal taxes.

Click to access IRS e-file or other popular forms and tools

To help last-minute tax filers in the metro area, the Portland Main Post Office (at 715 NW Hoyt St.) will be picking up mail from the blue collection boxes out front until midnight. The Salem Main Post Office and Eugene/Springfield Gateway Station will also postmark mail until midnight.

Customers at other post offices or blue boxes are urged to double-check pickup times before dropping off their returns.

Filers should also ensure tax returns have the proper postage (first class postage is 49 cents for the first ounce and 21 cents for each additional ounce).

IRS forms are not available at post offices.

Here are five more things to know:

  • YOU MAY NOT FACE MUCH OF A DEADLINE (IF YOU DON'T OWE) - If you're due a refund, and about three-quarters of filers typically are, the April 15 deadline is no big deal. Penalties for late filing apply only to people who owe money.
  • WHAT IF YOU JUST CAN'T GET IT DONE IN TIME? - The IRS allows taxpayers to file for extensions, giving them an additional six months. However, those who owe money must pay at least 90 percent of the total by midnight on the 15th to avoid a failure-to-pay penalty.
  • IF YOU OWE, THE PRICE FOR FILING LATE CAN BE SUBSTANTIAL - The penalty for failing to file is generally about 5 percent of your unpaid tax bill for every month, or part of a month, you are late. It kicks in April 16. The maximum penalty is 25 percent of your original tax bill.
  • CHANCES OF GETTING AUDITED ARE LOWEST IN YEARS - Budget cuts and new responsibilities are straining the Internal Revenue Service's ability to police tax returns. It will have fewer agents auditing returns than at any time since at least the 1980s.
  • WHO IS MOST AT RISK FOR BEING AUDITED? - Last year, the IRS audited less than 1 percent of all returns from individuals. Those groups getting the most attention were taxpayers who made the most money. People with incomes of $1 million or more were audited at a rate of 11 percent, and large corporations with assets over $10 million were audited at a rate of 16 percent.

Click for an interactive AP story on federal taxes

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