Can we please revisit this question in 2022. A little different though. On one of my W2s box 18 is the same as box 1,3,5,16. Why would that be? I tried to google the answer and cannot find an answer besides that box 1 and and 18 should be different. Box 18 being usually lower. I have 3 W2s this year, and going through last years W2s none of them have anything in box 18. I worked as nurse in an Adult day care( LLC).
