I started my return, but don't have all my 1099's yet. Can I go on to Deductions, and come back to Income later? Can I start my State return, even if I add 1099's later?

I'd like to enter as much as possible, so I'd like to move on to Deductions & Credits even though I'm not done with the Income section. And if I go ahead to the State section, but later work on Income again to add more 1099's, will they flow into the State return?