Records may be required by department to determine correct credit.

To ascertain the correctness of any claim under this subchapter or to determine the amount of the credit under this subchapter of any person, the department may examine, or cause to be examined by any agent or representative designated by the department, any books, papers, records or memoranda bearing on the homestead credit of the person, may require the production of the books, papers, records or memoranda, and require the attendance, of any person having relevant knowledge, and may take testimony and require proof material for its information. Based on the information it discovers, the department shall determine the true amount of homestead credit during the year or years under investigation.