What should you do if you already filed your federal tax return and then discover a mistake? Don't worry; you have a chance to fix errors by filing an amended tax return. This year you can use the new IRS tool, ‘Where's My Amended Return?’ to easily track the status of your amended tax return. Here are 10 facts you should know about filing an amended tax return.

  1. Use Form 1040X, Amended U.S. Individual Income Tax Return, to file an amended tax return. An amended return cannot be e-filed. You must file it on paper.
  2. You should consider filing an amended tax return if there is a change in your filing status, income, deductions or credits.
  3. You normally do not need to file an amended return to correct math errors. The IRS will automatically make those changes for you. Also, do not file an amended return because you forgot to attach tax forms, such as W-2s or schedules. The IRS normally will send a request asking for those.
  4. Generally, you must file Form 1040X within three years from the date you filed your original tax return or within two years of the date you paid the tax, whichever is later. Be sure to enter the year of the return you are amending at the top of Form 1040X.
  5. If you are amending more than one tax return, prepare a 1040X for each return and mail them to the IRS in separate envelopes. You will find the appropriate IRS address to mail your return to in the Form 1040X instructions.
  6. If your changes involve the need for another schedule or form, you must attach that schedule or form to the amended return.
  7. If you are filing an amended tax return to claim an additional refund, wait until you have received your original tax refund before filing Form 1040X. Amended returns take up to 12 weeks to process. You may cash your original refund check while waiting for the additional refund.
  8. If you owe additional taxes with Form 1040X, file it and pay the tax as soon as possible to minimize interest and penalties.
  9. You can track the status of your amended tax return three weeks after you file with the IRS's new tool called, ‘Where's My Amended Return?’ The automated tool is available on IRS.gov and by phone at 866-464-2050. The online and phone tools are available in English and Spanish. You can track the status of your amended return for the current year and up to three prior years.
  10. To use either ‘Where's My Amended Return?’ tool, just enter your taxpayer identification number (usually your Social Security number), date of birth and zip code. If you have filed amended returns for more than one year, you can select each year individually to check the status of each. If you use the tool by phone, you will not need to call a different IRS phone number unless the tool tells you to do so.

TaxACT Deluxe includes Form 1040X. View Instructions for amending your federal return and instructions for amending your state return.

Additional IRS Resources:

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Upcoming Tax Dates

February 2 Individuals who must make estimated tax payments
If you did not pay your last installment of estimated tax by January 15, you may choose (but are not required) to file your income tax return (Form 1040) for 2014 by February 2. Filing your return and paying any tax due by February 2 prevents any penalty for late payment of the last installment. If you cannot file and pay your tax by February 2, file and pay your tax by April 15.

February 2 All Employers
Give your employees their copies of Form W2 for 2014. If an employee agreed to receive Form W2 electronically, have it posted on a website and notify the employee of the posting.

February 2Payers of gambling winnings
If you either paid reportable gambling winnings or withheld income tax from gambling winnings, give the winners their copies of Form W2G.

February 2 Nonpayroll taxes
File Form 945 to report income tax withheld for 2014 on all nonpayroll items, including backup withholding and withholding on pensions, annuities, IRAs, gambling winnings, and payments of Indian gaming profits to tribal members. Deposit or pay any undeposited tax under the accuracy of deposit rules.

February 2 Social Security, Medicare, and withheld income tax
File Form 941 for the fourth quarter of 2014. Deposit or pay any undeposited tax under the accuracy of deposit rules. If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the quarter timely, properly, and in full, you have until February 10 to file the return.

February 2 Certain small employers
File Form 944 to report social security and Medicare taxes and withheld income tax for 2014. Deposit or pay any undeposited tax under the accuracy of deposit rules. If your tax liability is $2,500 or more for 2014 but less than $2,500 for the fourth quarter, deposit any undeposited tax or pay it in full with a timely filed return. If you deposited the tax for the year timely, properly, and in full, you have until February 10 to file the return.

February 2 Farm employers
File Form 943 to report social security and Medicare taxes and withheld income tax for 2014. Deposit or pay any undeposited tax under the accuracy of deposit rules. If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the year timely, properly, and in full, you have until February 10 to file the return.

February 2 Federal unemployment tax
File Form 940 for 2014. If your undeposited tax is $500 r less, you can either pay it with your return or deposit it. If it is more than $500, you must deposit it. However, if you deposited the tax for the year timely, properly, and in full, you have until February 10 to file the return.

February 2All businesses
Give annual information statements to recipients of certain payments you made during 2014 - Details

February 2Form 720 taxes
File Form 720 for the fourth quarter of 2014.

February 2 Wagering tax
File Form 730 and pay the tax on wagers accepted during December 2014.

February 2Heavy highway vehicle use tax
File Form 2290 and pay the tax for vehicles first used in December 2014.

February 10Nonpayroll taxes
File Form 945 to report income tax withheld for 2014 on all nonpayroll items. This due date applies only if you deposited the tax for the year timely, properly, and in full.

February 10Social security, Medicare, and withheld income tax
File Form 941 for the fourth quarter of 2014. This due date applies only if you deposited the tax for the quarter timely, properly, and in full.

February 10Certain small employers
File Form 944 to report social security and Medicare taxes and withheld income tax for 2014. This due date applies only if you deposited the tax for the year timely, properly, and in full.

February 10Farm employers
File Form 943 to report social security and Medicare taxes and withheld income tax for 2014. This due date applies only if you deposited the tax for the year timely, properly, and in full.

February 10Federal unemployment tax
File Form 940 for 2014. This due date applies only if you deposited the tax for the year timely, properly, and in full.

February 10Employees who work for tips
If you received $20 or more in tips during January, report them to your employer - Details

February 11Communications and air transportation taxes under the alternative method
Deposit the tax included in amounts billed or tickets sold during the first 15 days of January.

February 13Regular method taxes
Deposit the tax for the last 16 days of January.

February 17Everyone
Federal Holiday (Washington's Birthday) - Details

February 17Individuals
If you claimed exemption from income tax withholding last year on the Form W-4, you must file a new Form W-4 by this date to continue your exemption for another year - Details

February 17All businesses
Give annual information statements to recipients of certain payments you made during 2014 - Details

February 17Publication 509 (2015)
All payments reported on Form 1099S, Proceeds From Real Estate Transactions. Substitute payments reported in box 8 or gross proceeds paid to an attorney reported in box 14 of Form 1099MISC.

February 17Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in January.

February 17Nonpayroll withholding
If the monthly deposit rule applies, deposit the tax for payments in January.

February 18All employers
Begin withholding income tax from the pay of any employee who claimed exemption from withholding in 2014, but did not give you Form W4 to continue the exemption this year.

February 25Communications and air transportation taxes under the alternative method
Deposit the tax included in amounts billed or tickets sold during the last 16 days of January.

February 27Regular method taxes.
Deposit the tax for the first 15 days of February.

View More Tax Dates