yes, click on "update", "select and download new products"

but there is no 1120C option. Can you be more specific?

For the 1120C, just choose 1120

I did, but it does not have 1120C. Are you sure about this?

Are you wanting 1120-C U.S. Income Tax Return for Cooperative Associations?  I do not believe that is available through ProSeries.

That is what I thought. Thank you.

Sorry though you wanted C-CORP, as @dkh said not in ProSeries

That is ok. Do you think we might have this option in the software soon?

It does not looks like a complicated entry much different than 1120

I doubt it. You can make your request in the wishing well:

https://proconnect.intuit.com/community/proseries-tax-idea-exchange/idb-p/603