I received a letter from the IRS stating that I owe $1584, I made a mistake on one W2 and I corrected that. Also, there is aW2 reported that I didn't work for last year

[Critter · Accepted solution]

If this was an employer that you worked for at the end of 2015 then the last paycheck may have been issued in 2016 thus you have a 2016 W-2 to report.

However, if this is from an employer you never heard of then you can disagree with the IRS and respond to explain this issue ... this may have just been a mistake in the SS# reported OR it could be some kind of identity theft.