Sometimes tax returns need to be amended due to mistakes or omissions when the return is filed.  Here are some things to remember when amending a return:

1. Tax return amendments must be paper filed using Form 1040X.
2. Amended returns can take up to 16 weeks to process.
3. Amendments should be filed to correct errors in filing status, income, deductions, or credits.
4.  You do not need to file an amendment for math errors or for missing forms or information.  The IRS will correct math errors and send you a request for missing forms or information.
5. Generally, taxpayers have 3 years from the date of original filing to file an amendment and request a refund.
6. If you are amending more than one year, you need to prepare a Form 1040X for each year and mail each year’s amendment to the IRS in a separate envelope.
7. If you are due a refund and can amend to file for a larger refund, you should to wait to receive your original refund before filing an amendment.
8. If you owe additional tax, send the payment with your amendment to avoid additional penalties and interest.
9. Tax returns can be amended or filed for the first time here.