This document provides instructions for calculating Indiana net operating losses (NOL) on Form IT-40NOL. It outlines how to elect to waive carrying back an Indiana NOL and the carryback/carryforward periods. The example shows how to complete Form IT-40NOL to calculate an NOL for 2004 and carry it back to 2002 and 2003 using the carryback worksheets. Modifications must be made to the federal NOL amount to determine the Indiana NOL.