After you file

i received my refund and started to amend my taxes. While amending my federal taxes it never asked me if i itemized last year but it did have a section where if listed my refund from state from 2017 and it was already prefigured because turbo tax imported that number for me because i did my taxes last year with them. I reviewed all the information on my federal and nothing change with my refund then i started with state amended but state amended is asking for additional forms which i don't have. I just wanted to make sure i am doing the right thing by amended because it doesn't seem like it?