Per the Iowa Department of Revenue, if you were a nonresident or part-year resident, you are required to file a return if your Iowa source is $1,000 or more. Some examples of Iowa-source income are, wages earned in Iowa, rental income from a property in Iowa, and self-employment income earned while working in Iowa. In your case, if your 1065 shows less than $1000 in income from Iowa you would not be required to file a return.
For more information visit You must file an Iowa return if...