Since you're dealing with state taxes, I can't be of any help at all. I don't "do" states, since my state of FL does not tax personal income. Just never had to deal with it.
But if I were to make a wild guess based on no facts what-so-ever, it "sounds" to me like you told the state program that you received a K-1 for that rental property, from a business entity of some type that you have ownership in. All I can suggest, is that you delete the state return and start it anew from scratch, so it can report needed data from the federal return you've already completed.
