Indiana Code Title 6. Taxation § 6-3.1-40-9.5

(1) the physician owned medical practice must apply for the department's approval of the tax credit for its owners for a calendar year in the manner prescribed by the department after June 30 of that calendar year, but not later than June 30 of the subsequent calendar year;

(2) the physician owned medical practice must submit with the application a certified list of each of the physicians who has an ownership interest in the legal entity described in section 6 of this chapter and any additional information that the department determines is necessary for the calculation of the credit under this chapter;

(3) the taxpayer must attach proof of the department's approval of the tax credit to the taxpayer's state tax return or returns;  and

(4) the taxpayer must claim the approved tax credit on the taxpayer's state tax return or returns in the manner prescribed by the department.