W2 mistake

I efiled my Federal and received my refund. However I found I made a $20 gross income mistake(should have been more)., so my AGI is $20 less.  When I went back into Turbo Tax, to fix the $20 W2 it didn't have an impact to my refund.

 

Question.Should I admend and should I fix it on my state taxes. I'm assuming the sates compare AGI to federal.

Thanks

Jim