Well, you can stop bugging your mail carrier. There are more productive ways to track down your Internal Revenue Service cash.

Now you can go online, call a special toll-free number or even use your smart phone to check your refund status. The tracking options work regardless of whether you're awaiting a check in the mail or you've instructed the IRS to directly deposit your tax cash into one or multiple accounts.

The Waiting Game

Since 2003, taxpayers have been able to use the IRS' "Where's My Refund?" Web page to track down refunds directly from their own computers.

But exactly when you need this service depends on how you filed your return. Processing times differ for paper and electronically filed 1040s. How you ask the IRS to send you your money also makes a difference.

If you e-file and request direct deposit, the IRS says it should take no longer than three weeks for you to get your refund. If you filed a paper return and asked that your check be mailed to you, it could take up to eight weeks.

This year, there's also the issue of delayed tax return processing. Because tax law changes affecting 2010 returns weren't enacted until Dec. 17, 2010, the IRS had to update forms and its computer systems before it could process many returns. The IRS started working on those delayed filings on Feb. 14.

Once you're past the time frame for issuance of your refund, it's time to log on and locate your money.

Necessary Tracking Data

To get started, you'll need your Social Security number, the filing status entered on your return and the amount you're expecting. Joint-return filers should enter the name and tax ID number of the spouse shown first on the return.

And don't do any rounding on the refund amount entry. The tracking program wants precise dollars and cents.

If you have any questions about exactly what information the IRS wants here, the "Where's My Refund?" program has links that will open up new screens with explanations of where you can find the information on your copy of your return.

After you've entered the necessary data, click and wait for the good news that your check is in the mail.

Dialing for Tax Dollars

If you don't have access to a computer or simply prefer using a telephone, you still can call the IRS to track down your refund.

A special automated toll-free line is dedicated to refund status reports. When you call (800) 829-1954, you'll need the same information the online system requires.

In addition to having a copy of your return on hand, it's always a good idea to have paper and pen ready to jot down any information, additional instructions or follow-up phone numbers that you might receive during the call.

And, as with the online system, don't call unless it's been the requisite number of weeks for your filing method.

The IRS has gone mobile with IRS2Go, the agency's first smart phone application. It allows taxpayers to check on the status of their tax refund.

Once again, you'll need your Social Security number, filing status and expected refund amount to use IRS2Go.

After you find out what's up with your refund, you can use the app to sign up for IRS tax updates or follow the IRS on Twitter.

The IRS refund tracking app also has a "contacts" section, with telephone numbers and hours for the agency's various tax help lines as well as links to help you find your local taxpayer assistance center if you want some face-to-face help.

The IRS2Go app is free at the Apple App Store and the Android Market.

What's the Holdup?

Regardless of which tracking method is used, the IRS says that in most cases a taxpayer will learn that his or her return was received and is being processed.

When the tax check is indeed in the mail, the tracking systems will provide the date it was sent out or directly deposited to the filer's chosen account.

But even when the news is bad, the online program might be able to offer some immediate help. If, for example, the U.S. Postal Service bounced your refund check back to the IRS as undeliverable, the IRS online tracker now allows some taxpayers to correct or change their mailing addresses online so they can get their refunds ASAP.

If this option is available in your case, "Where's My Refund?" will prompt you to take the appropriate steps.

What if It's Lost?

Occasionally, though, a tax check actually is lost.

If your online or automated phone inquiry reveals your refund was mailed but it still hasn't shown up, you can begin an online refund trace using the "Where's My Refund?" program. This option is available for filers who are still waiting for refund money the IRS says was mailed at least 28 days earlier. If this is your situation, the online program will prompt you to take the next steps.

You also can call the IRS' main help line at (800) 829-1040. But be forewarned: During the filing season, you're probably in for a wait.

More localized assistance might be a better move. Check the IRS' "How to Contact Us" Web page for local and regional agency addresses and numbers.

Once the IRS verifies your refund check is lost or stolen, the replacement process will begin. You might be asked to complete Form 3911, Taxpayer Statement Regarding Refund, to get the ball rolling.