It's W-2 time!

Don't forget to check yours carefully-- and I mean really carefully!
Last year, mine didn't match my final paycheck and I went over the numbers repeatedly until I thought I had found the answer-- an error in whether or not they were showing my transit pass deductions as reducing my taxable income, due to switching systems mid-year. I spoke to HR and they agreed that there seemed to be a problem. Soon afterwards, they sent out an email to the whole company telling everyone who used the transit pass deduction that their W-2s were wrong and would have to be reissued. But then a few days after that, they retracted it and said the W-2s were actually fine. I did the math on mine yet again and finally figured out that it was right after all.
So double-, triple- and quadruple-check your W-2, if you want to avoid throwing your whole company into an uproar like I did!