Ah i see, then I wouldn't have to worry about 2018 tax then. Thanks a lot for your help - and sorry for so many questions, but i do have one more question. So I...
Saw this comment after I replied - box 4 in w2c is lower than the max you told me. Looks like I won't have to amend for either year then (2017 w2c box 4 is even...