I’m trying to add my W-2G income to muy taxes but it wants something for Box 14 but there isn’t anything in that box but it won’t let me move on

If 14 is blank leave boxes 13 thru 18 all blank.

If you were gambling in a state with no tax, then box 12 would be the last thing on your form, click continue and move on. However, you said there is nothing in box 14, so I am going to assume that you have a state  and ID number. Then state winnings in box 14 would match the income in box 1. 

Ok got it. Let me ask you this… Do I have to do a state tax form for Nebraska and Iowa? I only one $1000 in Iowa and I paid $50 in taxes

If you only made $1000 you do not have to file in Iowa.  

You don't give enough information on Nebraska to be able to answer the question.