After you file

You can track the status of your Federal amended return using the IRS website “Where's My Amended Return” or you can call 1-866-464-2050, (You need to wait about 3 weeks from the date you mailed your amended return for information to show up in their system).

http://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1

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If you have a State amended return you can check your State's website, they may have a link to check on your amended return.