<prompt> Human: Early in 2014 I did a one-off contracting job, and filed tax paperwork for the work. The work wasnt anything huge 200. I filed taxes early this year Jan 20th with the W2 from my salaried position35k, completely forgetting that I did this contracting gig. I filed with the standard deduction and already recieved my state refund MI. Will this forgotten W2 have any negative implications? It is a small enough percentage of my overall income that it wont put me in a new tax bracket, but I want to be sure I wont need to re-file etc.  <response>: You will need to file an amended tax return. If you dont you will receive a matching notice from the IRS saying you did not report this income. Use form 1040x to file the amended return. 