Got a letter from the IRS in the summer of 2016 or so saying that I owed four figures to them. My wife and I had purchased our house in 2015, I knew my finances were pretty good because of that, so I was ready to fight them on it.
Until I turned the page over where they neatly itemized the missing information that I had completely forgotten about.
Turns out you apparently need to claim your 50/50 winnings of $650 that you won in Ohio at an NMU/BGSU playoff game, even though the 1099 was sent to your old address after you moved to your new house.
And they also care when you withdraw 1/3 of a sorta forgotten 401K (that was rolled into an IRA from a previous job) that you used toward the down payment of said house.
Whoops. \_(ツ)_/