It's time to find someone to mentor you on 1120, to take some continuing ed classes, and to otherwise get up to speed on this entity type and the tax regulations and how they apply. You cannot ask the internet to teach you this tax type in a peer user forum for how to use ProSeries. This is not the place for How to Learn to do taxes. Peer users cannot be responding to you one-and-one as a training cycle. This is not Intuit Tech Support or Customer Support.