File Form 1040X along with any related attachments. If you are filing the amended tax return because you received a notice from the IRS, mail it to the address listed in the notice.

About three million 1040X forms are filed each year, the IRS says. It’s often used to fix a mistake, but you can also file an amended return to tax advantage of tax credits that have been ...

Amended returns are prepared on Form 1040X, whether you previously filed Form 1040, 1040A or 1040EZ. If you are amending more than one tax return, prepare a separate 1040X for each return.

Form 1040X should not be used for items such as math errors or missing forms. The IRS will correct math errors and send you a request if any missing form is needed to process your return. 1040X ...

Fixing errors on your tax return will be less of a hassle going forward. For the first time, taxpayers are now able to file Form 1040X, the document used to amend tax returns, electronically with ...