Iowa net operating losses (NOLs) are generally carried back two years. Trump's federal disaster declaration, effective 1/20/2020, the carried back is 3 years.
Guidance related to Public Law 116-94 and Division Q of that Act which extends several federal tax provisions, many retroactively to tax years 2018 and 2019.
Iowa and Illinois have a reciprocal agreement for individual income tax purposes. At this time, Iowa's only income tax reciprocal agreement is with Illinois.