Indiana Code Title 6. Taxation § 6-3-4.5-5

Sec. 5. (a) For purposes of this chapter, a report of proposed partnership adjustments for a taxable year is considered a report of final partnership adjustments upon the latest of:

(b) If, upon protest or appeal, an adjustment in a report of proposed partnership adjustments is determined to be incorrect, the department shall issue a report of final partnership adjustments consistent with the determination not more than one hundred eighty (180) days after the determination is otherwise determined to be final under subsection (a)(1) through (a)(3).  If the report of final partnership adjustments is not issued within one hundred eighty (180) days, one (1) day for each day that the report of final partnership adjustments is issued after the one hundred eighty (180) day deadline is added to the deadline for which a partnership or tiered partner may act without being subject to assessment under section 18 of this chapter.  In the case of a partnership with multiple tiers, this extension applies to each tier.

(c) Notwithstanding subsection (a), if the partnership and the department enter into a settlement agreement under IC 6-8.1-3-17 to resolve all matters related to the report of proposed partnership adjustments for a taxable year, the report of final partnership adjustments for that taxable year reflected in the agreement shall be issued final one hundred eighty (180) days after the date of the signature of the last party required to sign the agreement.