State tax filing

This is exactly the kind of page I need, but it simply never takes me there.  I've been back and forth dozens of time- I never see this page.  I only have the page where that # is already determined, and I can choose how to allocate between me and spouse.  Is it possible it matters which state return I start first?  I did DC first since I lived there first, but could it somehow be causing a problem?

I get a page called 'additional info for part year residents' that just has one box for "non-Maryland income."  It doesn't break it down into Capital Gains, Dividends, Interest, etc?

Thanks!