<prompt> Human: EDIT: In response to those who like to wait until the last minute to file, Ive had all of my forms available online for a few weeks now, except the one from the mechanic job. Im not doing it for the money, I just dont like procrastinating with this kind of thing.EDIT 2: Some awesome responses here, even got an IRS employee. I got notifications saying that the IRSstate already accepted my returns, so it looks like Ill be sending a 1040X as soon as my refund shows up.---The title may be a bit vague, sorry. Let me clarify.In 2014, I had three jobs: Mechanic - started job July 2011, ended job January 11, 2014 Management - Started Job January 14, 2014; ended job August 1, 2014 IT - Started August 4, 2014 current jobWhen I did my taxes, I made sure to have all of the paperwork I needed. This included my management and IT jobs, school, 401k, etc. I just filed my taxes yesterday through Turbo Tax, sent in and completed. Except when I got home and checked my mailbox, there was a W2 from my mechanic job that I had completely forgotten about. The amount I had made from that company in 2014 was between 1300-1400 as reported on that W2.Im a little peeved by this and kicking myself for not waiting another day or two, but what can I do? Should I do anything about it?Let me know if Im missing important details or if something needs to be clarified. Thanks.  <response>: You need to amend your tax return. 