Electronic filing is mandated for originally filed corporate returns and extensions filed on Form 355, 355S, 355SC, and 355-7004 when gross federal income exceeds $100,000. Review Massachusetts TIR 04-30, TIR 05-22, and TIR 10-18 for requirements. Additionally, electronic filing is mandated for pass-through entities unless all members consist entirely of resident individuals. Electronic filing is also mandated for pass-through entities with pass-through withholding. Review Massachusetts TIR 09-18 for requirements.