The IRS can take up to 16 weeks to process an amended return. To check the status of your amended return, please visit the IRS Where’s my Amended Return website located at http://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1. You can also go to irs.gov and search “Where’s My Amended Return?” In order to use the service, you will need your SSN, date of birth and zip code.