I know this post is almost 1 year old. I'm in exactly same situation right now. Box 15 (state) has TX in it but no employer ID. Box 16 (state wages, tips etc) has the same numbers as box 1 (wages, tips, other comp). Box 17 (state income tax) is empty because there is none in TX.
The company who produce this W2 is dumb to fill them out when there's no state income tax in TX. Those 3 boxes should be empty on the W2. Turbotax keeps flagging that W2. It needs an employer ID or else it is invalid and I won't be able to file electronically. It stops flagging when I remove them entirely (ie. delete entries in box 15, 16, 17) and proceed. I have not filed it yet. I hope there won't be any problems when I submit it electronically.
