Yes---an amended return is prepared on a 1040X and it must be filed by mail. You will not be able to e-file it.
Do not expect quick results from amending. It will take the IRS 4-6 months to process an amended return. Use a mailing service to track it so you will know they received it when you mail it.
You can watch for information here:
https://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
