Ask a CPA: 'How Do I Fix a Mistake on My Already-Filed Tax Return?'

The I.R.S. has a reputation for being fairly punitive, handing down heavy fines, audits and, in severe situations, prison sentences--which can be intimidating. That leaves some people seeking the fastest way to fix a mistake before it causes a bigger issue.
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In our new "Ask a CPA" Q&A series, we're ceding the floor to a Certified Public Accountant, who will address some of the trickiest tax topics out there.

Today, Paula Marie Bruce, a CPA in Sausalito, Calif., explains how (and why) you should go about fixing an error on your tax return--as soon as you notice it.

"Navigating tax season can be confusing, especially if you're preparing your return by yourself.

Since most people aren't tax experts, it's all too easy to make a mistake--whether it's forgetting to report income from your side gig, or misunderstanding which deductions you're eligible for and how to apply them.

Fortunately, you can catch careless flubs by reviewing your return before you drop it in the mailbox--but what if you don't realize you've made an error until later?

That's the conundrum behind the question many panicked people want to know:

Why So Many People Ask This Question The I.R.S. has a reputation for being fairly punitive, handing down heavy fines, audits and, in severe situations, prison sentences--which can be intimidating.

That leaves some people seeking the fastest way to fix a mistake before it causes a bigger issue, and others wondering if they should try to hide the error instead.

What I Tell Them Never let your fear prevent you from fixing a mistake. Although it's possible that flagging an issue could cause the I.R.S. to take a closer look at your 1040--and potentially open an audit--the penalties for lying or committing fraud are significantly more severe.

If your mistake was a simple math error, don't sweat it--the I.R.S. will probably fix this for you. But if there's a more substantial issue--like you claimed a credit you weren't owed--it's time to file a Form 1040X.

You can complete it yourself, although I typically recommend working with a tax professional, because it can be tricky. For instance, if your mistake affects your tax liability at both the state and federal level--like an incorrect filing status--you may need to fill out an additional state form.

The next step is to complete an amended version of any supporting forms, like a W-2, that applies to your mistake. You should write "as amended" in the top right corner of the first page in pen. After that, fill out an entirely new, regular 1040 and write "as amended" at the top, as well.

Finally, if possible, include a copy of the original return that has the mistake on it, so it's easy for the I.R.S. to compare the old and new documents. If you don't properly package your materials, it could result in a processing delay.

Although I recommend doing this as soon as you notice the mistake, there is a generous grace period. To claim a refund, you must file your 1040X within three years from the date you filed the original return.

Bottom Line Don't let a mistake go unfixed on your return. Even though it can be a pain to walk through these steps, you don't want a simple error to come back to bite you later."

This post originally appeared on LearnVest.

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LearnVest Planning Services is a registered investment adviser and subsidiary of LearnVest, Inc., that provides financial plans for its clients. Information shown is for illustrative purposes only and is not intended as investment, legal or tax planning advice. Please consult a financial adviser, attorney or tax specialist for advice specific to your financial situation. Unless specifically identified as such, the individuals interviewed or quoted in this piece are neither clients, employees nor affiliates of LearnVest Planning Services, and the views expressed are their own. LearnVest Planning Services and any third parties listed, linked to or otherwise appearing in this message are separate and unaffiliated and are not responsible for each other's products, services or policies.

15 Super Weird Taxes
Sliced Bagel Tax(01 of15)
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You might want to think twice about getting that schmear. In New York City, bagels that are sliced or prepared are subject to sales tax, whereas whole bagels are not, according to the Wall Street Journal. (credit:<a href="http://www.flickr.com/" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="Flickr" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="25" data-vars-position-in-unit="37">Flickr</a>:<a href="http://www.flickr.com/photos/73645804@N00/5361206960" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="woodleywonderworks" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/photos/73645804@N00/5361206960" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="26" data-vars-position-in-unit="38">woodleywonderworks</a>)
Pet Tax(02 of15)
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If you live in Durham, North Carolina, you could be paying a tax on Rover. The state charges a $10 tax for neutered and spayed pets and $75 for pets that are not neutered or spayed, according to Turbo Tax. (credit:Shutterstock)
Candy Tax(03 of15)
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In Illinois, all candies are subject to an extra tax, unless they contain flour, like the Whopper pictured here. (credit:WikiMedia:)
Elderly Tax Exemption(04 of15)
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By the time you're 100, you've paid enough in taxes, at least according to the state of New Mexico, where people over 100 years old are tax-exempt. (credit:Shutterstock)
Flush Tax(05 of15)
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If it's yellow, let it mellow could be the motto of some Maryland and Virginia residents looking to save money. In these two states there's a tax on flushing the toilet, according to Bing. (credit:<a href="http://www.flickr.com/" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="Flickr" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="19" data-vars-position-in-unit="31">Flickr</a>:<a href="http://www.flickr.com/photos/23116228@N07/8388175670" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="Sustainable sanitation" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/photos/23116228@N07/8388175670" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="20" data-vars-position-in-unit="32">Sustainable sanitation</a>)
Crack Tax(06 of15)
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Tennessee anonymously collects a tax on illegal drugs, according to NPR. In 2006, the state collected $1.5 million from the tax. (credit:WikiMedia:)
Diaper Tax(07 of15)
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Adult diapers are exempt from sales tax in Connecticut, but if you're buying diapers for your kids you'll have to pay taxes on those, according to Thomson Reuters. (credit:Getty Images)
Napkin Tax(08 of15)
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Colorado levies a tax on "non essential" food packaging items, according to Business Insider. That means you'll pay a tax on paper cup lids and napkins, but not on paper cups themselves. (credit:<a href="http://www.flickr.com/" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="Flickr" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="14" data-vars-position-in-unit="26">Flickr</a>:<a href="http://www.flickr.com/photos/10883933@N07/7232801772" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="IvanWalsh.com" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/photos/10883933@N07/7232801772" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="15" data-vars-position-in-unit="27">IvanWalsh.com</a>)
Sex Tax(09 of15)
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Businesses in Utah that employ nude or partly nude workers are required to pay a 10 percent sales tax, according to U.S. News and World Report. (credit:AP)
Card Deck Tax(10 of15)
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If you buy cards in Alabama you'll pay a 10 cent tax on the deck, according to Turbo Tax. Meanwhile, Nevada gives free decks in exchange for completed returns. (credit:WikiMedia:)
Holiday Decorations Tax(11 of15)
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In Texas, holiday-themed pictures that are meant to be placed on walls are taxed, according to efile.com. (credit:<a href="http://www.flickr.com/" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="Flickr" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="9" data-vars-position-in-unit="21">Flickr</a>:<a href="http://www.flickr.com/photos/47166549@N00/8381566559" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="latteda" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/photos/47166549@N00/8381566559" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="10" data-vars-position-in-unit="22">latteda</a>)
Tattoo Tax(12 of15)
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In Arkansas, there's a 6 percent sales tax on tattoos, according to Turbo Tax. (credit:<a href="http://www.flickr.com/" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="Flickr" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="6" data-vars-position-in-unit="18">Flickr</a>:<a href="http://www.flickr.com/photos/64118549@N03/6692203151" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="ValentinaM-" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/photos/64118549@N03/6692203151" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="7" data-vars-position-in-unit="19">ValentinaM-</a>)
Litigation Tax(13 of15)
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New York has a tax on litigation, according to ABC News. (credit:<a href="http://www.flickr.com/" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="Flickr" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="3" data-vars-position-in-unit="15">Flickr</a>:<a href="http://www.flickr.com/photos/69613400@N06/8223098211" role="link" rel="nofollow" class=" js-entry-link cet-external-link" data-vars-item-name="cousine4everkis" data-vars-item-type="text" data-vars-unit-name="5b9ea83ee4b03a1dcc9bb389" data-vars-unit-type="buzz_body" data-vars-target-content-id="http://www.flickr.com/photos/69613400@N06/8223098211" data-vars-target-content-type="url" data-vars-type="web_external_link" data-vars-subunit-name="before_you_go_slideshow" data-vars-subunit-type="component" data-vars-position-in-subunit="4" data-vars-position-in-unit="16">cousine4everkis</a>)
Hot Air Balloon Tax(14 of15)
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In Kansas, you have to pay taxes on that hot air balloon ride -- or risk flying away. In that state tethered balloons are taxed, but those that roam free are not because they are considered a legitimate form of transportation, according to ABC. (credit:AP)
Fresh Fruit Vending Machine Tax(15 of15)
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Another reason not to buy your fruit from a vending machine. Fresh fruit is exempt from sales tax in California, unless it's sold from a vending machine, according to U.S. News and World Report. (credit:Getty Images)

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