If you discover an error after you file your tax return, you can correct it by amending your return. Here are 10 tips from the Internal Revenue Service about amending your federal tax return:

  1. When to amend a return Generally, you should file an amended return if your filing status, number of dependents, total income, tax deductions or tax credits were reported incorrectly or omitted. Additional reasons for amending a return are listed in the instructions.
  2. When NOT to amend a return In some cases, you do not need to amend your tax return. The IRS usually corrects math errors or requests missing forms - such as Forms W-2 or schedules - when processing an original return. In these instances, do not amend your return.
  3. Form to use Use Form 1040X, Amended U.S. Individual Income Tax Return, to amend a previously filed Form 1040, 1040A, 1040EZ, 1040NR or 1040NR-EZ. Make sure you check the box for the year of the return you are amending on the Form 1040X. An amended tax return cannot be filed electronically.
  4. Multiple amended returns If you are amending more than one year’s tax return, prepare a separate 1040X for each return and mail them in separate envelopes to the appropriate IRS processing center (see "Where to File" in the instructions for Form 1040X).
  5. Form 1040X The Form 1040X has three columns. Column A shows original figures from the original return. Column B shown the changes you are making. Column C shows the corrected figures. There is an area on the back of the form to explain the specific changes and the reasons for the changes.
  6. Other forms or schedules If the changes involve other schedules or forms, attach them to the Form 1040X. Failure to do this will cause a delay in processing.
  7. Additional refund If you are amending your return to get an additional refund, wait until you have received your original refund before filing Form 1040X. You may cash that check while waiting for any additional refund.
  8. Additional tax If you owe additional tax, you should file Form 1040X and pay the tax as soon as possible to limit interest and penalty charges.
  9. When to file Generally, to claim a refund, you must file Form 1040X within three years from the date you filed your original tax return or within two years from the date you paid the tax, whichever is later.
  10. Processing time Normal processing time for amended returns is 8 to 12 weeks.

TaxACT Deluxe includes Form 1040X. Instructions for amending your federal return can be found here and instructions for amending your state return can be found here.

Links:

  • Instructions for Form 1040X (PDF 45K)

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Upcoming Tax Dates

April 10 Employees who work for tips
If you received $20 or more in tips during March, report them to your employer. You can use Form 4070.

April 10 Communications and air transportation taxes under the alternative method
Deposit the tax included in amounts billed or tickets sold during the first 15 days of March.

April 14 Regular method taxes
Deposit the tax for the last 16 days of March.

April 15 Individuals
File a 2014 income tax return (Form 1040, 1040A, or 1040EZ) and pay any tax due. If you want an automatic 6 month extension of time to file the return, file Form 4868, Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. For more information, see Form 4868. Then, file Form 1040, 1040A, or 1040EZ by October 15.

April 15 Individuals
If you are not paying your 2015 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2015 estimated tax. Use Form 1040ES.

April 15 Household Employers
If you paid cash wages of $1,800 or more in 2014 to a household employee, you must file Schedule H - Details

April 15 Partnerships
File a 2014 calendar year return (Form 1065) - Details

April 15 Partnerships
Electing large partnerships: File a 2014 calendar year return (Form 1065-B) - Details

April 15 Corporations
Deposit the first installment of estimated income tax for 2015 - Details

April 15 Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in March.

April 15 Nonpayroll withholding
If the monthly deposit rule applies, deposit the tax for payments in March.

April 15 Household employers
If you paid cash wages of $1,900 or more in 2014 to a household employee, you must file Schedule H (Form 1040). If you are required to file a federal income tax return (Form 1040), file Schedule H (Form 1040) with the return and report any household employment taxes. Report any federal unemployment (FUTA) tax on Schedule H (Form 1040) if you paid total cash wages of $1,000 or more in any calendar quarter of 2013 or 2014 to household employees. Also, report any income tax you withheld for your household employees.

April 27 Communications and air transportation taxes under the alternative method
Deposit the tax included in amounts billed or tickets sold during the last 16 days of March.

April 29 Regular method taxes
Deposit the tax for the first 15 days of April.

April 30 Social security, Medicare, and withheld income tax
File Form 941 for the first quarter of 2015. 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 May 11 to file the return.

April 30 Federal unemployment tax.
Deposit the tax owed through March if more than $500.

April 30 Form 720 taxes
File Form 720 for the first quarter of 2015.

April 30 Wagering tax
File Form 730 and pay the tax on wagers accepted during March.

April 30 Heavy highway vehicle use tax
File Form 2290 and pay the tax for vehicles first used in March.

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