Ind. Code § 22-4-9-2

Sec. 2. Except as otherwise provided in sections 4 and 5 of this chapter, IC 22-4-7-2(f), and IC 22-4-11.5, an employing unit shall cease to be an employer subject to this article only as of January 1 of any calendar year, if it files with the commissioner, prior to January 31 of such year, an application for termination of coverage in the form and manner prescribed by the department, and the commissioner finds that the employment experience of the employer within the preceding calendar year was not sufficient to qualify an employing unit as an employer under IC 22-4-7-1 and IC 22-4-7-2.