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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March 2015
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Upcoming Tax Dates

March 2All businesses
File information returns (for example, Forms 1099) for certain payments you made during 2014.

March 2Farmers & fishermen
File your 2014 income tax return (Form 1040) and pay any tax due - Details

March 2Payers of gambling winnings.
File Form 1096 along with Copy A of all the Forms W2G you issued for 2014. If you file Forms W2G electronically, your due date for filing them with the IRS will be extended to March 31. The due date for giving the recipient these forms remains February 2.

March 2 All employers
File Form W3, Transmittal of Wage and Tax Statements, along with Copy A of all the Forms W2 you issued for 2014. If you file Forms W2 electronically, your due date for filing them with the SSA will be extended to March 31. The due date for giving the recipient these forms remains February 2.

March 2 Large food and beverage establishment employers
File Form 8027, Employer's Annual Information Return of Tip Income and Allocated Tips. Use Form 8027T, Transmittal of Employer's Annual Information Return of Tip Income and Allocated Tips, to summarize and transmit Forms 8027 if you have more than one establishment. If you file Forms 8027 electronically, your due date for filing them with the IRS will be extended to March 31.

March 2 Wagering tax
File Form 730 and pay the tax on wagers accepted during January.

March 2 Heavy highway vehicle use tax
File Form 2290 and pay the tax for vehicles first used in January.

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

March 11 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 February.

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

March 16 Corporations
File a 2014 calendar year income tax return (Form 1120) and pay any tax due - Details

March 16 S Corporations
File a 2014 calendar year income tax return (Form 1120S) and pay any tax due - Details

March 16 S Corporation election
File Form 2553, Election by a Small Business Corporation, to elect to be treated as an S corporation beginning with calendar year 2015. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2016.

March 16 Electing larger partnerships
Provide each partner with a copy of Schedule K1 (Form 1065B), Partner's Share of Income (Loss) From an Electing Large Partnership, or a substitute Schedule K1. This due date applies even if the partnership requests an extension of time to file the Form 1065B by filing Form 7004

March 16 Social security, Medicare, and withheld income tax
If the monthly deposit rule Page 6 Publication 509 (2015) applies, deposit the tax for payments in February.

March 16 Nonpayroll withholding
If the monthly deposit rule applies, deposit the tax for payments in February.

March 25 Communications and air transportation taxes under the alternative method.
Deposit the tax included in amounts billed or tickets sold during the last 14 days of February.

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

March 31 Electronic filing of Forms W2
File copies of all the Forms W2 you issued for 2014. This due date applies only if you electronically file.

March 31 Electronic filing of Forms W2G
File copies of all the Forms W2G you issued for 2014. This due date applies only if you electronically file.

March 31 Electronic filing of Forms 8027
File Forms 8027 for 2014. This due date applies only if you electronically file.

March 31 Wagering tax
File Form 730 and pay the tax on wagers accepted during February.

March 31 Heavy highway vehicle use tax
File Form 2290 and pay the tax for vehicles first used in February.

March 31 Electronic filing of Forms 1097, 1098, 1099, 3921, 3922, and W2G.
File Forms 1097, 1098, 1099, 3921, 3922, and W2G with the IRS. This due date applies only if you file electronically. Otherwise, see March 2. The due date for giving the recipient these forms generally remains February 2. View More Tax Dates