Indiana Code Title 6. Taxation § 6-3-4-16.7

Sec. 16.7. (a) For taxable years ending after December 31, 2019, a partnership that is required to provide twenty-five (25) or more schedules K-1 of form IT-65 to partners or a corporation that is required to provide twenty-five (25) or more schedules K-1 of form IT-20S to shareholders must file all such schedules in an electronic format specified by the department.

(b) For taxable years ending after December 31, 2021, an estate or trust required to provide ten (10) or more schedules K-1 of form IT-41 to beneficiaries must file all such reports in an electronic format specified by the department.

(c) If the department receives a form IT-65, form IT-20S, or form IT-41 with more than fifty (50) schedules K-1 in a format other than the electronic format specified by the department, the department may provide written notification to the partnership, estate, or trust that the department will consider the schedules to not be filed until the schedules have been filed in the specified electronic format.