Indiana Code Title 6. Taxation § 6-3-4.5-15

Sec. 15. (a) If the department receives the partner level adjustments report, amended statement, or similar report required to be provided under section 6 of this chapter and the department determines that a taxpayer has not reported the correct amount of tax to the department for a taxable year of the taxpayer affected by the partner level adjustments report, the department shall issue a proposed assessment to the taxpayer not later than:

whichever is latest.

(b) If a taxpayer receives multiple partner level adjustments reports or amended statements relating to the same report of final partnership adjustments, the last day for issuing a proposed assessment to the taxpayer is the latest time for which the department could issue an assessment for any partner level adjustments report or amended statement arising from the report of partnership adjustments as determined under this section.

(c) The taxpayer may protest or appeal the proposed assessment or refund denial in the same manner as prescribed in IC 6-8.1-5 or IC 6-8.1-9-1, whichever is applicable.  However, any adjustments made pursuant to a report of final partnership adjustments shall be considered final as to the taxpayer.