Could you provide evidence of any corporation asking for greater government regulation? (Negotiating on regulation already on its way from the govt. or already in place doesn't count...)
And even if I were to agree with what you wrote, your statement doesn't support the contention that "Corporatism=Collectivism" since only some corporations behave in that way.
If your general statement of equivalence is to be supported, you must show that a corporation inherently leads to or equals collectivism. A few bad actors in the corporate world don't condemn all the rest.
One feature Fascists and Communists have in common is the mandatory worship of, and subjugation of the individual to, the structure of collective governance.
What do you mean by "collective governance"?
Oh, and there is a very distinct, definitive difference between Fascism and Communism. Do you know what it is? Do you then understand how quotes about Italian Fascism do nothing to support your claim that "Corporatism=Collectivism=Communism"?