Can my 19 year old boys who graduate high school 2016, whom I am claiming , file their 2016 W2s for under $2000 in earnings next year with their 2017 W2s.

I have twin 19year old boys who attended high school and graduated in June & August 2016.  They both received under $2000 ea on W2s,. I am claiming them this year, and was wondering can they report these W2s next year along with 2017 W2s, to get their federal withholdings back from this years W2?