WI Form 5, Corporation Franchise or Income Tax, cannot be e-filed if the federal return includes an 1120-C or 1120-H.
Federal 1120-C and 1120-H returns are not e-fileable and generate EF messages that cannot be cleared.
Federal EF Message 0083
FORM 1120-H INELIGIBLE: Form 1120-H, U.S. Income Tax Return for Homeowners Associations, is not eligible for electronic filing. File Form 1120-H as a paper return.
Federal EF Message 0006
FORM 1120-C NOT E-FILEABLE: Form 1120-C is not eligible for e-filing.
These EF messages also prevent WI Form 5 from being e-filed by causing WI EF Message 1023:
A FEDERAL MESSAGES PAGE WAS PRODUCED, THEREFORE DISALLOWING THE STATE TO BE TRANSMITTED.