How to Fix an Error on a Filed State Tax
If you file a state tax return and later find an error, you can correct the mistake by filing an amended return with the state Department of Revenue. Some corrected errors may result in additional state taxes owed, and some corrected errors may result in no change in tax or an additional refund. Correct any errors you find as soon as possible, especially when the correction creates an additional tax balance; interest and penalties may accrue on any unpaid taxes you owe.
Instructions
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Obtain a copy of the return you originally filed. Amended returns require you to include information from the original return in addition to the new information.
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Navigate to the state Department of Revenue website for the state return you must correct (see Resources). You also need the individual income tax instruction booklet for the tax year you’re amending.
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Find the form you need to amend your return. Type “amend return” in the search field of the Department of Revenue website, or search the “Forms and Publications” section for amended return forms. Use the correct form to amend an individual return. In most cases, the amended return form is similar in format to the return you originally filed that needs correction.
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Complete the form. Include your original return entries and corrected entries where indicated. Explain why you are changing your return in the explanation section.
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Mail your amended return to the state Department of Revenue. Most states do not allow electronic submissions of amended returns. If you expect an additional refund as a result of the corrections to your state income tax return, you must file the amendment within a certain period of time. In most states, amended returns are due within three to four years from the date your original return was due. For example, your 2010 income tax return is due April 15, 2011. If your state requires amended returns be filed within three years of the original due date, you must file your corrected 2010 state income tax return by April 15, 2014.
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