Drake Tax - State Returns that cannot be e-filed with Federal Form 1120-H or 1120-C
Article #: 11073
Last Updated: October 01, 2026
Wisconsin
WI Form 5 cannot be e-filed if the federal return includes an 1120-C or 1120-H
Federal 1120-C returns are not e-fileable. This generates EF Messages 0006 and 0083, which cannot be cleared. These EF messages also prevent WI Form 5 from being e-filed by causing WI EF Message 1023.
Connecticut
Connecticut CT1120 cannot be e-filed if the federal return is an 1120-H or 1120-C. EF Message 0023 generates preventing e-file.