<prompt> Human: I tried my hand as a realtor this year and only made one sale for 3,000 commission and forgot to document it. will the IRS come after me on this? I worked other jobs this year and filed them but I forgot to include this income since it was a 1099 and I have never done that before. EDIT: Yes I met last year  <response>: If the 1099 income was in 2014, and you received a 1099, you need to report it. You can do this by filing a 1040-X for 2014. The IRS receives copies of all 1099s, and eventually will notice the discrepancy. 