2017 is the first year I'm using TT so prior years carryover losses from a rental property won't automatically populate. Can anyone tell me how to enter them manually?

I've seen an older (2015) reply to this question but the reply references screens that don't match the 2017 program.  I'm assuming the prior year accumulated losses have to entered on form 8582, but when I get to that form it can't be edited.